Maximum Strength Steel Lock Assembly is a heavy-duty cast grade 30 steellock with pins that are mechanically fastened in place for optimum strength. No welds to fail or plating to burn off and rust.Features: Extra thick padlock provision designed for greater security Trapped handle cannot pull out to bypass keeper resulting in tamper-proof lock Spring assisted lock eliminates door bounce Stainless steel spring C will not rust Can be used as a lift handle in open position Keeper accommodates padlocks and trailer seals