The Andersen EZ Block, a robust jack block, is ideal for all bumper-tow trailers, compatible with various jack types, including scissor, post, and pad jacks. Notably, its recessed post hole enhances stability by preventing slipping. Designed to withstand dirt and oil, these blocks are stackable for additional height, with a caution against stacking more than two high. It features: Andersen EZ Block: sturdy jack block for bumper-tow trailers Compatibility: works with scissor, post, and pad jacks Stability: recessed post hole prevents slipping Durability: resistant to dirt and oil Stackability: can be stacked for extra height (maximum of two blocks high) Warranty: made in the USA with a lifetime warranty, ensuring longevity and reliability Finger Holes on each side for easy moving Rated at 2,000 lbs (single or double stacked) Dimensions: 12" x 8.5" base, 8" x 4.5" pad rest, 8" tall (14" tall when double-stacked) Recessed post-hole is 2-1/2" diameter