Tools not required. Carpet tread removes easily. Machine washable. Rubber grippers on bottom keep step secure and in place. Snaps together very easily. Light-weight-can be moved from room to room. A gentle slope makes it effortless for pets to reach sofas, beds, and more. Weight capacity: 150 lbs.. 28 in. L x 16 in. W x 16 in. H (11 lbs.). Instruction Manual. Warranty Instruction. The Pet Gear StRamp is the most innovative design in the market today. A gentle slope makes it effortless for pets to reach sofas, beds, and more. The carpet tread removes easily and is machine washable. It snaps together easily.