Weather Tough Padlocks, 5/16 in Diam., 1 1/8 in L X 7/8 in W

For extreme conditions and corrosive environments. Hardened steel and boron-alloy shackles for superior cut resistance. Dual deadbolt locking for extreme resistance to prying. 5-pin tumbler Pro Series® cylinders provide tens of thousands of key changes. Special spool pins are virtually impossible to pick.