Stainless Steel and High QualityThis stainless steel marking ruler set is made of high quality stainless steel,rigid,not easy to break,durable and rust-proof,never worry the dimension on the metal square tool will go off easily High PrecisionThe ultra precision woodwork measuring tools with holes is clear,accurate,versatile and easy-to-use for carpenter blueprint draft,CNC machining,make marking convenient and high efficient Wide Range of UsesThe metal measuring scribe line ruler is flexible and easy to operate,can scribe horizontal line,vertical line,long line,short line, parallel line and right angled line,is a perfect helper for artists,designers,architects,engineers,carpenters do blueprint,draft,or students DIY craft work,can satisfy various marking needs Easy to Operate Our metal Protractor woodworking ruler hole scriber with accurate stop,is a combination square for marking or measuring,that's simultaneously set to every scale position,only locate your sharp pencil or scribe then the absolute precision line you will get