1-1/8" wide laminated steel case. Warded locking mechanism. Patented crowned locking lever. Cadmium rustproofing. Self-locking steel swivel shackle provides strong cut resistance. Warded locking mechanism minimizes jamming from dirt and grime. Nickel-plated, diameter 3/16". Clearances: Vertical 1/2", horizontal 1/2". 2 nickel-plated steel keys. 105 key changes.