Locking 501 restraints provide security and comfort all in one. Fits juvenile to adult populations. The L-300 lock buckles promote authorized release. Universal K-300 key opens the L-300 lock and operates locking belt as well. Standard orthopedic leather lining and optional foam padding are available to enhance comfort. This popular and versatile restraint may be used in many settings including bed, chair, gurney and ambulatory situations. Use with Humane Restraint's disposable fleece liners FWL-200 (Wrist) and FAL-200 (Ankle) for additional comfort.