Patented boron-carbide shackle 50 percent harder than hardened steel. Professional grade ball bearing locking for superior pull strength and pry resistance.; ; Brand Name: Master Lock Height: 1-7/8 in. Width: 1-3/16 in. Length: 1-3/4 in. Lock Material: Laminated Steel Locking Mechanism: Ball Bearing Locking Product Type: Padlock Number in Package: 1 pk Keyed Alike: Yes Color: Black Shackle Height: 1-1/2 in. Shackle Width: 13/16 in. Combination Type: Keyed Resettable or Customized Combinations: No TSA Approved: No Adjustable Shackle: No Packaging Type: Boxed Shackle Diameter: 5/16 in. Shackle Clearance: 13/16 in. Rekeyable: No