Master Lock 6321MK Padlock 

• Iron Shroud Protects from Bolt Cutters
• ProSeries Locks Designed for Commercial and Industrial Applications
• 2-1/8in (54mm) Wide Heavy Steel Body Withstands Physical Attack
  
• Dual Ball Locking Mechanism Resists Pulling and Prying
  
• Master Keyed (MK): Each padlock in the set will have its own unique key, and a Master Key will open all locks in the set. Master Keys (MK) are Sold Separate
• Cylinder: Rekeyable 5-Pin W6000 Cylinder with Pick-Proof Spool Pins
  
• Shackle: 3/4" (19mm) Tall, 5/16" (8mm) Hardened Boron Alloy Shackle
  
• Available Keyways: Also available with Master Lock W1, W15, W17, W27, W81 & W7000 Keyways (must specify keyway if different from Standard W6000)
• Specs_Width: 2-5/8" Wide; A: 5/16" (8mm) B: 3/4" (19mm); C: 7/8" (22mm)
  
• Best Used For: Severe Use on Construction Sites & Equipment; Security Gates & Fences; Trailers, Trucks & Towing

For 6321MK Extra Cut Keys

Master Keys for 6321MK Locks