Master Lock® Weather Tough® Safety Padlock, Rekeyable, series: ProSeries®, Alike Key, Laminated Steel Body, 5/16 in Shackle Diameter, 1-1/8 in Shackle Height, 7/8 in Shackle Width, Boron Hardened Steel Shackle, 2-1/8 in Body Width, 5-Pin Tumbler Locking Mechanism, Black. Master Lock® 6121KA Weather Tough® ProSeries® Rekeyable Safety Padlock, Alike Key, 5/16 in Shackle, Laminated Steel Body, Black