Solid steel body with brass locking cylinder. Protective chrome-plated brass ring in base and chrome-plated hardened shackle. Includes 3 steel keys. Horizontal x vertical shackle clearance: 447136: 25.7 x 20mm; 595754: 23 x 27mm; 327568: 27 x 33mm; 291405: 37 x 36mm. Shackle dia: 447136: 7mm; 595754: 10mm; 327568: 11mm; 291405: 12mm.