ML1 --> Master Lock® Keyed Padlock - No. 1
Product Description

Plug-N-Lok Padlockable Security Plugs
Keyed differently
1-3/4" wide laminated steel body
Hardened steel shackle for extra cut resistance that measures 5/16" (D) x 3/4" (W) x 15/16" (H)
4-pin cylinder to prevent picking
Dual Locking levers for extra pry resistance
Includes 2 keys per lock