Master Lock 5MK Padlock 

• Commercial Grade Padlock Features Protection from Drilling & Prying
• 2" (51mm) Wide Reinforced Laminated Steel Body for Superior Strength
• 1-Inch Tall (3/8" Diameter) Hardened Boron Alloy Shackle for Extra Cut Resistance
• Dual Ball Bearing Locking for Maximum Pry Resistance; Non-Rekeyable, 4-pin W1 Cylinder Helps Prevent Lock Picking
• Specs_Width: 2" Wide; A: 3/8" (10mm) B: 1" (25mm) C: 15/16" (24mm)
  
• 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 5MK Extra Cut Keys

Master Keys for 5MK Locks