American Lock A5201 Padlock 939185 is rekeyable with a non-removeable key feature. The A5201 Solid Steel Padlock 939185 from American Lock is impact-resistant and one of the strongest padlocks available. Suggested for securing gates, sheds, truck and van doors, industrial machinery and construction equipment, this American Lock security padlock is constructed of a hardened, triple-plated steel body capable of resisting break-in attempts, corrosion, rust and debris. The rekeyable feature on this solid steel padlock allows you to replace the cylinder and shackle, which makes it easy to service. The stainless steel double ball locking mechanism provides more assurance in the padlock's strength and performance. American Lock A5201 NR Solid Steel Lock 939185 is also has a non-removable key which won't allow you to remove the key if the lock is still open. This prevents you from walking away without securing the lock.