Master Lock® Safety Padlock, Commercial Grade Non-Rekeyable, Keyed Different Key, Laminated Steel Body, 3/8 in Shackle Diameter, 1 in Shackle Height, 15/16 in Shackle Width, Boron Hardened Alloy Steel Shackle, 2 in Body Width, 4-Pin Tumbler Locking Mechanism, 2 Bumpers. Master Lock® 5 Commercial Grade Non-Rekeyable Safety Padlock, Keyed Different Key, 3/8 in Shackle, Laminated Steel Body