The easy bedside mobility solution, M-Rail™ fits snugly against your mattress and helps you get comfortable, re-position, sit-up, balance, stand or transfer to a chair or wheelchair. Features a contoured padded handrail. Fits twin to king, economy to pillow-top. Easy assembly; no tools required. Suitable for home-style beds with box spring. 300 lbs (136 kg) maximum user weight capacity.