The No. 570 is a pin-tumbler padlock made by Master Lock. The No. 570 uses an aluminum padlock body with an internal key-in-knob-style cylinder. The inner cylinder uses five pin stacks and may use security pins. 

**Principles of operation**\\
The No. 570 cylinder is a pin-tumbler lock with five pin stacks and security pins.\\
The cylinder uses a mirrored M1 key profile. The standard No. 570 can be opened in one direction. The No. 570 is a key retaining padlock.\\
The shackle and plug are both unsprung and will require manual rotation while picking and returning the key to the locked state.\\
The No. 570 uses a dual ball-bearing locking mechanism.\\

**Videos**