About this item Compact Protable Design: ideal for elderly, pregnant women, and sports injury recovery(back issue/ waist issue/ knee issue). Its ergonomic grab bars provides stabilizing support. It allows individuals to stand up without other's help, minimizing the risk of falls and reinjury when one get in and out of the bed. Adjustable NonSlip Rail: height adjustable from 21.7'' to 22.4''. Secure To Any Bed Frame: Suitable for any standard bed frame. It fits King, Queen, Full, Twin. Simple Assembly: Easy to set up and easy to remove.Thick mattresses can be interested directly without screw drilling and thin mattresses requires screw for fixing.