The Master Lock Magnum® no. M515XKADLJ laminated padlock features a 2-1/8 In. (54 mm) wide laminated steel body for maximum strength and reliability, and is surrounded by stainless steel and zinc outer components for weather resistance. The Rust-Oleum® certified protection provides a lifetime guarantee against rusting on the lock body; and covered clock body, keyway, and shackle seals offer additional weather protection. The 3/8 In. (10 mm) diameter octagonal shackle is 2-1/2 In. (64 mm) long and made of Tough-Cut™ 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 lifetime guarantee provides peace of mind from a brand you can trust. Magnum; choice of professionals Rust-Oleum; certified protection guarantees lock body will not rust Tough-Cut™ octagonal boron-carbide shackle is 50% harder than hardened steel 2.5-in (64mm) shackle clearance for more uses Dual-armor construction: 2.13-in (54 mm) wide laminated steel core with weather-resistant cover protects against snow, rain, dirt, mud, grime and salt Covered keyway and shackle seals for added weather protection Dual ball bearing locking for maximum pry resistance 4-pin cylinder for increased pick resistance Color/Finish Family: Black Manufacturer Color/Finish: Black Series Name: Heavy Duty Outdoor Height (Inches): 4.826 Shackle Diameter (Inches): 0.346 Shackle Height: 2-1/2-in Shackle Width (Inches): 0.951 Thickness (Inches): 1.3 Width (Inches): 2.12 Width Measurement: 2-1/8-in Adjustable: No Combination Type: N/A (not combination) Contractor Grade: Yes Dial Count: N/A (keyed lock) For Use with Bikes: No For Use with Laptops: No For Use with Luggage: No Keys Included: Yes Lock Material: Steel Lock Type: Keyed padlock Number of Pins: 4 Package Quantity: 1 Rust Protection: Yes Shrouded Shackle: No Use Location: Indoor or Outdoor Warranty: Lifetime Weatherproof: Yes App Compatibility: No Bluetooth Compatibility: No Smart Compatible: No Wi-Fi Compatibility: No Works with Android: No Works with iOS: No CA Residents: Prop 65 Warning(s): No TSA Accepted: No UNSPSC: 46171500