A wobbly camper turns a weekend trip into a balancing act. The right jack block spreads the load across soft ground, fills the gap on a sloped site, and keeps the tongue jack from sinking into gravel after rain. With so many shapes, sizes, and materials on the market, choosing a block that actually does the job without slipping, cracking, or taking up half the storage bay is worth a few minutes of thought. This shortlist narrows the field to five solid options across single-block, magnetic, stackable, and heavy-duty categories, each matched to a common RV setup and the kind of site an owner actually parks on.
The Shortlist At A Glance
Vacallity RV Trailer Jack Block (1 Pack)
Andersen Hitches 3608 Magnetic Jack Block
OULEME 24-Pack Stackable Leveling Blocks
Hyfico 20,000 lb RV Leveling Block w/ Bag
HOXWELL RV Jack Block w/ Bag (1 pc)
Meet The Standout Selections
A no-fuss single block suits owners who park on relatively level pads and want something that slides into a storage compartment without fuss. The Vacallity block stands 3.3 inches tall and is molded from HDPE (high-density polyethylene), a plastic that resists cracking in cold weather and shrugs off road grime. Compared to the tall Andersen Hitches block that follows, this one is short and stout, built more for filling a small gap than for spanning a steep grade.
For most short stops, a single low-profile block tucks under a tongue jack and disappears into the basement when the trip ends. Light travel trailers and teardrops tend to sit nicely with this kind of fill, and the material cleans up with a quick rinse.
Everyday Wins
- Compact 3.3-inch height fits tight basement storage on small campers.
- HDPE body resists weather, road salt, and the usual outdoor abuse.
- Lightweight form makes placement under a tongue jack quick.
- Single-pack format keeps the cost down for occasional use.
Things To Consider
- The short profile offers limited lift on seriously sloped sites.
- Lacks a magnet or anti-slip texture, so a sticky pad helps on smooth concrete.
Made For
Owners of lightweight trailers who camp mostly on paved or gently graded sites and want a simple fill piece.
Consider Something Else When
The Andersen Hitches 3608 is a stronger match for campers parked on soft ground who want a magnetic top to lock the block to the jack pad.
The 3608 leans on a built-in magnet that grabs the steel jack pad and keeps the block exactly where it was placed. At 8 inches tall with a 12-inch base, it lifts a tongue jack further off the ground than the Vacallity block and spreads the load across soft soil. The recessed finger holes along the side solve a small but real annoyance: picking the block back up without scraping knuckles.
On uneven campground pads or rain-soft grass, the wide base resists tipping while the magnet prevents the block from skating out from under the jack as the camper settles. Rated to 8,000 lb single-stacked, it covers most travel trailers and many fifth wheels without breaking a sweat.
What Pays Off
- Magnetic top locks to the jack pad, stopping drift on slick surfaces.
- Generous 8-inch lift handles bigger grade changes than short blocks.
- Wide base spreads weight across soft or sandy ground.
- Finger holes make pickup easy even when kneeling in gravel.
Worth Noting
- The magnet only grabs steel jack pads, leaving aluminum jacks without that benefit.
- Single-piece design limits stacking height unless paired with another block.
Quick Facts
Best Suited To
Travelers who move often between sites and want a single block that grips the jack pad without sliding during setup.
Look Elsewhere When
The OULEME 24-Pack stackable set is a smarter call for owners who need to dial in exact heights on very uneven terrain.
The OULEME set trades the single big block for twenty interlocking blocks and four caps that snap together like puzzle pieces. Each block is roughly 8.5 by 8.5 inches and adds about an inch of height to a stack, so the owner builds the exact lift needed rather than guessing. Where the Andersen 3608 gives a fixed 8-inch lift, this set scales anywhere from one inch to several inches depending on the slope.
Yellow polypropylene (a tough, UV-treated plastic) stays visible in grass and shrugs off sun damage. The stack approach feels like building with bricks, and once shaped, the rig sits on a custom pyramid of support that matches the site’s contours.
Strong Points
- Custom stack height from 1 inch up to several inches of lift.
- Interlocking shape resists the lateral slide that plagues plain blocks.
- Bright yellow color is easy to spot in grass or at dusk.
- Polypropylene build with UV additives handles sun exposure well.
Trade Offs
- Carrying twenty-four small pieces takes more effort than one chunky block.
- Stacking tall pyramids requires care, since higher stacks can shift on soft ground.
Who Will Love This
RVers tackling rough, sloped, or remote sites where the lift needed changes from one trip to the next.
Another Choice May Suit
The Hyfico block is a cleaner single-piece answer for owners who prefer a heavy-duty chunk over a tower of smaller pieces.
The Hyfico block targets the heavy end of the market with a 20,000 lb load rating, more than enough for most fifth wheels and toy haulers in the driveway. The redesigned top resists water pooling, which is the kind of detail that only matters after one winter of freezing and thawing. Unlike the OULEME set’s stack of small parts, this single block arrives ready to drop under a jack.
The included carry bag stows the block neatly in a basement compartment without rattling around for six hundred miles. Side grip holes let an owner reposition without crawling under the trailer, and the smaller footprint compared to older blocks saves space when stacked.
Where It Helps
- 20,000 lb rating covers large fifth wheels and heavy toy haulers.
- Drainage-friendly top keeps water from collecting and freezing.
- Side grip holes ease repositioning without crawling under the rig.
- Carry bag keeps the basement tidy during travel.
Points To Keep In Mind
- Single-block design caps the lift at one piece, so very tall grades need stacking with another block.
- Heavier body adds a few pounds to the cargo load.
Feature Snapshot
Right Fit For
Owners of heavy fifth wheels and toy haulers who want a single, oversized block that won’t flinch under the tongue weight.
Skip It When
The HOXWELL block is a more flexible fit for owners running varied jack styles who want an anti-slip surface and lighter carry weight.
HOXWELL designs for the jack-style lottery that RV owners actually face: round, square, scissor, post, or foot. The anti-slip texture and grooves on the top surface grip whatever jack shape sits on it, so the same block works across multiple rigs in a household. Where the Andersen 3608 relies on a magnet to stay put, the HOXWELL leans on friction and surface geometry.
Rated to 10,000 lb, it covers most travel trailers and lighter fifth wheels. The handle and rope, plus the included carry bag at just under three pounds, make it painless to lug from the truck bed to the jack position.
The Value In It
- Anti-slip grooves grip round, square, and scissor jacks equally well.
- 10,000 lb rating covers a wide range of trailer classes.
- Light 2.87 lb body and carry handle ease transport.
- Universal fit means one block serves several rigs in the driveway.
Less Ideal Details
- No magnetic assist, so very slick pads may need an anti-slip mat underneath.
- Single-piece lift means extreme grades still call for stacking with a second block.
Built With In Mind
Households running more than one RV or owners who switch between jack styles and want a block that adapts.
Where Another Pick Suits Better
The Andersen Hitches 3608 is the smarter choice for owners with steel jack pads who want a magnetic lock on slick concrete.
What To Weigh Before Picking Rv Jack Blocks
Match The Block To The Jack Style
A block that fits a round tongue jack may wobble under a square post or scissor foot. Round, square, and scissor jacks each have a different footprint, and the right block has either a wide enough base or an anti-slip texture that grips whatever shape lands on it. Magnets help on steel pads but do nothing for aluminum or composite jack surfaces. Before picking, check the shape and material of every jack on the rig, including stabilizers at the corners.
Think About Load And Lift Together
A block’s load rating tells how much weight it can carry, and its height tells how much it lifts the rig. A short 3-inch block cannot span a 6-inch slope, no matter how strong it is. For heavily loaded fifth wheels, a higher rating matters more than for a teardrop, while for steep driveways, taller lift or a stackable system beats brute strength. Match both numbers to the rig and the worst site you actually visit.
Consider Material And Storage Reality
HDPE and polypropylene both resist weather and road salt, but they weigh and store differently. A single heavy block slides into one compartment; a 24-pack stack takes more thought but stows flat. Owners with limited basement space often prefer a single block with a carry bag, while those who camp on unpredictable terrain lean toward stackable systems that adapt on the fly.
Key Considerations Across These Picks
Mistakes Worth Dodging
Shoppers often grab a block rated well above the trailer’s tongue weight and call it done, ignoring height. A 20,000 lb block that is only 2 inches tall cannot lift a rig out of a slope. The reverse trap is just as common: a tall stack of light-duty blocks that looks impressive but flexes under real weight. Match load rating and lift height to the rig before anything else.
What Separates Premium From Basic
Higher-tier blocks earn their price through features that survive real use: magnetic tops, anti-slip grooves, drainage-friendly surfaces, and carry bags. Each addresses a specific pain, like a block sliding on concrete or water pooling and cracking in winter. For frequent travelers, those touches save real setup time. Weekend campers on tame ground may never notice, and a basic block serves them well.
Final Verdict
For most RVers, the Andersen Hitches 3608 hits the right balance of lift, grip, and load rating. Heavy-rig owners should look at the Hyfico block for its massive rating, while stackable-site travelers will appreciate the OULEME set. Match the block to the jack style, the slope, and the storage bay, and the campsite wobble disappears.