Master Lock 1MK Padlock 

• Commercial Grade Padlock Protects Against Drilling & Prying
  
• 1-3/4" (44mm) Wide Laminated Steel Body for Superior Strength
• 15/16" (24mm) Tall, 5/16" (8mm) Diameter Hardened Steel Shackle for Superior Cut Resistance; Dual Ball Bearing Locking for Maximum Pry Resistance
• Non-Rekeyable, 4-pin W1 Cylinder Helps Prevent Lock Picking
• Specs_Width: 1-3/4" Wide; A: 5/16" (8mm) B: 15/16" (24mm) C: 3/4" (19mm)
  
• Master Keyed (MK): Each lock 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
• Best Used For: Construction Sites & Equipment; Industrial Storefront and Business Gates and Fences, Tool Cribs; Vending Machines 

For 1MK Extra Cut Keys

Master Keys for 1MK Locks