A combination square is probably one of the most useful and versatile tools you can buy for general setting out. It functions as a try square, 45° mitre square, rule, depth gauge, marking gauge and level. You can use it for measuring, marking, scribing, and comparing and transferring measurements. The Axminster Professional combination square features a 300mm stainless steel rule with a cast iron stock. The stock also incorporates a level bubble and a hardened steel scriber. The precision machined and ground cast iron stock guarantees accuracy. A knurled brass screw, locking the rule in place is very positive and easy to use. The blade is hard-chromed with a pearl finish for maximum clarity, graduated in millimetres and marked every 10mm.