Indoor and outdoor locks are best used as gym lockers for general security and security The key lock is made of metal body, scratch and corrosion resistant, hardened steel shackle, cutting resistance. Hardened steel shackle for extra cut resistance. MATERIAL: Solid brass padlock body is strong and stylish,and make the lock highly durable SECURITY: Keyed alike padlock. Hardened steel shackle for superior cut resistance,use keyway design for added security and 4-pin cylinder helps prevent picking EASY TO USE: This brass padlock is easy to install and hand. One lock with 2 same keys, easy to open USAGE: Wide range of general security applications best used for backpacks, duffel bags, sports bags, briefcases, computer bags, cabinets and tackle boxes,etc. PROTECTION SYSTEM – Dual Lever locking mechanism and rust free internal mechanism for increased security