The No. 7035KA from Master Lock Keyed Alike - order multiple locks to open with the same key or order to match other locks with the Shackle shroud protects from bolt cutters ProSeries Padlocks are designed for Commercial/Industrial applications 1-9/16" (40mm) heavy hardened steel body with chrome rustproofing for high security with long life 1-1/16" (27mm) tall, 1/4" (6mm) diameter hardened boron alloy shackle for superior cut resistance