TOWKING Trailer Jack Blocks 6" 4-Pack — 12,000 lb Stackable RV Jack Blocks, UV-Stabilized

TOWKING 6" 12000lbs Trailer Jack Blocks are a stackable, heavy-duty RV jack block system that raises and stabilizes trailer tongues safely and quickly.

These four stackable tongue jack blocks are engineered for travel and workshop use, offering a complete kit with a 12,000 lb support rating, anti-tilt cone base, and accessories for secure transport. Molded from UV-stabilized polypropylene, each block is shaped to accept most jack feet and includes drainage, ergonomic grips, and a quick-strap in a 600D storage bag. The design focuses on predictable stacking, no-wobble stability on uneven ground, and a compact kit that replaces bulky lumber or unreliable supports.

How do these blocks fit different trailer jack feet?

The TOWKING blocks feature a 10" platform with a 2.5" central hole sized to accept most tongue, wheel, scissor, and fifth-wheel jack feet. The universal opening and broad contact surface distribute load evenly, reducing pressure points that can sink into soft ground or deform jacks. Their geometry keeps feet centered and prevents slipping during lifting or leveling.

• 10" platform accepts most jack foot sizes for broad load distribution.
• 2.5" hole fits common jack studs and bolts without adapters.
• Cone-shaped base and 8 ribs resist lateral movement and soft terrain.
• Works with tongue jacks, scissor jacks, wheel jacks, and many 5th wheel setups.

Are these blocks strong and weatherproof enough for long trips?

Yes — the blocks are rated for 12,000 lbs and molded from UV-shielded polypropylene to resist sun degradation and seasonal temperature changes. The material choice offers long-term durability without rotting or splintering, unlike wood, and the kit’s drain holes prevent water pooling that could freeze or add weight. The included 600D bag and quick-strap keep the set secure during storage and transport.

• 12,000 lb load rating per recommended stacked configuration.
• UV-stabilized polypropylene resists cracking and sun damage.
• Drain holes avoid water collection and freeze-related issues.
• 600D carry bag and strap for tidy, travel-ready storage.

How does the anti-tilt design improve stability on uneven ground?

The cone base and eight radial ribs increase ground contact and bite, minimizing tilt and wobble on gravel, dirt, or soft grass. The blocks lock together securely when stacked, preventing lateral shifts under load and providing a predictable lift height every time. This reduces the need for constant readjustment during leveling or while hitching and unhitching.

• Cone base sinks slightly into soft surfaces for a locked footprint.
• Eight ribs reinforce the block against lateral forces and shear.
• Interlocking stack design prevents accidental slippage when loaded.
• Quick, repeatable stacking gives consistent 6" to 8.6" heights.

What accessories come with the 4-piece kit and how do they help?

The kit bundles everything to save you from piecing items together: stackable blocks, a quick-strap for secure stacking, and a heavy-duty 600D storage bag for neat transport. Ergonomic grips in the block corners speed handling, while molded drain channels and the bag protect the set and keep it ready at a moment’s notice. Buying the set delivers immediate savings versus purchasing components separately.

• Complete 4-pack with quick-strap and 600D carry bag included.
• Ergonomic grips make handling easier when cold or dirty.
• Molded drain holes prevent standing water in the blocks.
• Cost-smart kit saves compared to buying pieces individually.

Who is this for? If you tow an RV, trailer, or camper and need a compact, reliable jack support that’s travel-ready, corrosion-resistant, and quick to deploy, the TOWKING 6" 12000lbs stackable jack block kit is designed for you. It suits weekend campers, full-time RVers, DIY mechanics, and anyone who prefers a durable plastic alternative to wood or metal blocks for safer leveling, hitching, and stabilized parking.