Range of high security padlocks with hardened steel pop up shackle.Those with removeable (REM) shackles can be used with the unique Mul-T-Lock hasp or converted to closed shackle with appropriate shackle guard (Nos 6 and 8 excluded).The sprung loaded shackle version (POP) can also be converted to closed shackle with appropriate shackle guard. All models are key retained when open.