21683 Features: -Master key padlocks.-Solid anodized aluminum.-Double ball bearing locking mechanism.-Re-keyable 5 pin brass cylinder and anti-pick pinning.-Each shackle padlock comes with 2 keys.-Complies with OSHA rule (1910.147) for safety lockout guards against accidental start-up injuries.-Accepts master key (master key sold separately).-Box quantity of 5. Color/Finish: -Hardened steel shackle padlocks are color coded to keep things organized and safe. Dimensions: -Chrome plated hardened steel shackle is 0.25" diameter x 1" vertical clearance x 0.78" horizontal clearance.-Body dimensions: 1.81" H x 1.5" W x 0.75" D. Warranty: -1 Year warranty.