Master Lock High Security Padlock

A presentation and review of the Master Lock High Security Padlock. This padlock weighs , it is 75mm wide and 115mm high. The Shackle diameter is . The key in knob cylinder has a larger diameter as the usual ones and the keys are also larger. This padlock was distributed from 1978 and discontinued in 2004 with a retail price of $ Please also take a look at the discussion on the Antique Locks Forum: Master Lock Patent