What is a round disc padlock and when are they best used?

A disc, discus or round-shackle padlock is disc shaped and has a curved shackle that goes right the way around its circumference. The very design automatically affords it the status and security rating of a ‘closed-shackle’ padlock. The padlock body itself is not solid, contrary to the traditional padlock design. The circular shackle is enclosed […]