Heavy duty outdoor lock; Maximum security combination lock is best used as a gate lock, shed lock, or storage lock.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.Control Method:Application Set your own four digit combination lock for easy combination recall; No combination change tool required, Shackle seal and hinged dial cover for superior weather resistance Padlock is constructed with a zinc body and reinforced body bumper for strength and reliability; Shackle seal and covered dials for superior weather protection; One directional dial feature for low light applications Tough-Cut octagonal boron steel shackle is 50% harder than hardened steel; Roller pin cylinder provides maximum pick and pry resistance 2-1/4 inch (57 millimeter) wide lock body; 3/8 inch (10 millimeter) diameter shackle with 1-1/2 inch (38 millimeter) length, 15/16 inch (24 millimeter) width; Extended shackle for application flexibility