Andersen Hitches 4" Magnetic Jack Blocks 2-Pack — 30,000 lb Capacity, Low-Profile RV Stabilizers

Andersen Hitches 4-inch Jack Blocks with built-in magnets are a two-pack of heavy-duty stabilizing blocks that lock to round jack pads and support up to 30,000 lb per block for secure, low-profile RV, trailer, and fifth-wheel jack placement.

These compact magnetic jack blocks are engineered to give RV owners a fast, stable way to set and hold jacks where clearance is limited. Each 4"-high block features embedded magnets that attach to round jack pads so the block stays aligned while lowering the jack foot. Made in the USA and backed by a lifetime warranty, this 2-pack speeds campsite setup and adds an extra margin of safety for heavy rigs.

How do these blocks speed up campsite setup?

The pair arrangement lets you prepare two jacks at once — front and rear or both stabilizers — eliminating the need to fetch single blocks one at a time. The magnets hold each block to the jack pad while you lower the jack, preventing slips and readjustments.

• Two magnet-equipped blocks for simultaneous placement
• Top-mounted magnets lock to round jack pads during lowering
• Compact 4" height reduces handling and trip time
• Drop-in use with no tools required

Will these support my heavy motorhome or fifth wheel?

Yes — each block is rated to carry up to 30,000 lb, enough for Class A motorhomes, large fifth wheels, and heavy trailers when used as intended. The rating means the blocks handle substantial vertical loads, providing a stable base for jack feet in everyday leveling tasks.

• 30,000 lb capacity per block for heavy rigs
• Suitable for large fifth wheels and Class A motorhomes
• Robust design in a compact 4" footprint
• Engineered for vertical load stability under jack feet

Do the magnetic blocks fit my jack pads and low-clearance situations?

The magnets are arranged to secure to standard round jack pads so the block stays centered under the jack foot. With a 4-inch profile, these blocks are ideal where site grade or low clearance makes taller blocks impractical.

• Top magnets match round jack pad geometry
• 4" height works where 8" blocks are too tall
• Compact shape fits confined campsite spaces
• Helps avoid over-extension of jacks in uneven terrain

What about durability and warranty?

Manufactured in the USA, Andersen Hitches’ jack blocks combine sturdy materials with a lifetime warranty, reflecting confidence in long-term performance. The magnets are embedded to resist dislodging, and the block construction stands up to repeated loading and outdoor use.

• Made in the USA for consistent quality control
• Embedded magnets placed for secure attachment
• Durable construction designed for repeated use
• Lifetime warranty included for owner peace of mind

Who is this for? Andersen Hitches 4" Magnetic Jack Blocks (2-pack) are intended for RV owners, fifth-wheel and trailer users, and anyone who needs a fast, low-profile way to support jacks on heavy rigs. They’re particularly useful for operators dealing with tight clearance at campsites, those who want to speed setup by prepping two jacks at once, and owners who prefer a magnet-secured block over loose pads.