The Master Lock M175EURDLH has the following specifications: 50mm Excell(tm)(tm) zinc body with brass finish 4-digit resettable combination padlock - 51mm Octagonal boron carbide shackle, 9mm diameter - Roller pin locking mechanism - 10,000 possible combinations The Master Lock Excell(tm) Combination Padlocks are made with cutting edge technology to deliver unprecedented security. Featuring tough cut patented octagonal boron carbide shackles which are tough to cut. It has a 4-digit resettable combination with up to 10,000 possible combinations and is easy to reset (no reset tool needed). The angled dials with 'blind use' feature are practical and easy to use. The roller pin locking mechanism delivers an exceptional level of resistance to pulling/prying. Supplied with a Lifetime .