The Knaack 70168-221 Cylinder D-Handle Lock M221 helps secure compatible storage boxes and tool chests by controlling access through the locking mechanism. This replacement lock cylinder fits within the D-handle assembly and works with the corresponding key to engage or release the lock. A properly functioning cylinder supports reliable closure, controlled access, and dependable secur... https://www.wholetoolbox.com/knaack-70168-221-cylinder-d-handle-lock-m221/70168-221.html