Master Lock No. 6830 Brass Lock: Master Lock 6830 Series Locks, 1-9/16" Wide Pro Series Solid Brass Padlocks Ideal for Marine & Offshore Security. Keying: Keyed Different (KD), Keyed Alike (KA) or Master Keyed (MK); Choose Shackle: 1-1/16" or 1-9/16" Tall. Master Lock No. 6830 Brass Lock 1-9/16" (40mm) Wide Solid Brass Body Hardened Boron Alloy Shackle for Maximum Cut Resistance Dual Ball Locking Mechanism Resists Pulling and Prying Pro Series Locks Designed for Commercial and Industrial Applications Shackle: 1-1/16" (27mm) or 1-9/16" (40mm) Tall Cylinder: Rekeyable 5-Pin W6000 Cylinder with Pick-Proof Spool Pins Keying: Keyed Different (KD), Keyed Alike (KA) or Master Keyed (MK) Available Keyways: Also available with Master Lock W1, W15, W17, W27, W81 & W7000 Keyways (must specify keyway if different from Standard W6000) Specs_Width: 1-9/16" Wide; A: 1/4" (6mm) B: 1-1/16", 1-9/16" or 3"; C: 25/32" (20mm) Best Used For: Severe Use Outdoors, including Marine & Offshore Security; Security Gates & Fences; Construction Sites & Equipment For No. 6830 Extra Cut Keys Master Keys for No. 6830MK Locks