Master Lock No. M40 Magnum Discus Lock 

• Magnum is the #1 Choice of Professionals
• 2-3/4in (70mm) Wide Laminated Steel Body
• Reinforced Body Bumper for Scratch Resistance
• Dual Ball Bearing Locking For Superior Pry Resistance
• Octagonal Boron Carbide Shackle is 50% Harder than Hardened Steel
• Dual Armor Protection: Laminated Steel Core Insulated by Stainless Steel & Zinc Outer Components for Weather Resistance
  
• Shackle: 5/8" (16mm) Tall
• Cylinder: 4-Pin W1 Cylinder
• Keyed Different (KD):Each Lock Will Come With its Own Set of Keys, All Sets Different; Master Lock Does Not Take Special Key Requests for No. M40 Locks
  
• Specs_Width: 2-3/4" Wide; A: 3/8" (10mm); B: 5/8" (16mm); C: 1-1/32" (26mm)
  
• Best Used For: Storage Unit Locks - Severe Use on Storage Units & Storage Lockers; Garage Lock, Shed Lock, Trailer Lock & Moving Truck Lock