Indoor and outdoor lock is best used as a gate lock or shed lock for protection and security from theft; extra long shackle for application flexibility.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. Set your own four digit combination lock for easy combination recall; combination change tool included Combo lock is constructed with a solid body for strength and weatherability, hardened steel shackle for cut resistance 2 in. (51mm) wide lock body; 5/16 in. (8mm) diameter shackle with 2-1/4 in. (57mm) length, 1 in. (25mm) width Shackle is preset to open on 0-0-0-0; see user manual for combination reset instructions