The Yale Locks Brass Padlocks are constructed from hard wearing boron and are rigorously tested against corrosion. The 4 pin cylinder with single locking feature (20mm) and 5 pin cylinder with double locking feature (30 & 60mm).Pack of 2 Yale Locks Brass Padlocks 20mm. Each padlock has a steel shackle and 4 pin cylinder with single locking feature. Tested up to 48 hours for corrosion resistance to ensure protection against different weather conditions. Specifications: Body Width: 21.4mm.Body Height: 21.8mm.Body Depth: 10mm. Shackle Diameter: 3.3mm.Shackle Height: 23.5mm.Shackle Width: 10.8mm.PTDYALY110B202