Master Lock® No. 1Ka Keyed Padlock – 15/16″ Shackle – Keyed Alike Two Keys Included. 1-3/4″Wide Laminated Steel Body For Superior Strength. Hardened Steel 5/16″ Diameter Shackle For Extra Cut Resistance. 4-Pin Cylinder Helps Prevent Picking. Dual Locking Levers Provide Extra Pry Resistance. Hardened Bottom Plate For Drill Resistance. Top-And-Bottom Bumpers For Great Scratch Resistance. Proprietary Rustproofing For Longer Life. Shackle Measures 15/16″ Inside Height And 3/4″ Inside Wide. The Master Locks Are.