Set consists of 2 of each brass locks 20 25 and 30 mm shackle heights 10 13 17 mm three keys are supplied for each lock ideal for bicycles rucksacks lockers etc the width and height inside the shackle is 20 approx 10 x 14 mm shackle approx 28 mm 25 approx 13 x 16 mm shackle approx 33 mm 30 approx 16 x 18 mm shackle approx 42 mm