The Master Lock ExcellΒ® No. M115EURDLF Laminated Padlock features a 49mm wide laminated steel body for maximum strength and reliability, and is surrounded by stainless steel and zinc outer components for weather resistance. The Rust-OleumΒ® Certified protection provides a Limited Lifetime Warranty against rusting on the lock body; and covered clock body, keyway, and shackle seals offer additional weather protection. The 8mm diameter octagonal shackle is 38mm long and made of Tough-Cutβ„Ά boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.