The Master Lock No. 380T Laminated Padlocks feature a 1-9/16in (40mm) wide laminated steel body for maximum strength and reliability. The Rust-Oleum Certified finish provides a lifetime guarantee against rusting on the lock body. The 9/32in (7mm) diameter shackle is 1-1/8in (29mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.