Stainless Steel MaterialThe T-type tracing ruler is made of stainless steel, which is anti-rust, anti-wear, sturdy and durable in use. Three Sizes in Pption You have chosen three sizes. Measuring range: 0~400mm. Silver color makes the appearance simple, generous, practical. And including 12 pencil pieces. Pencil diameter: 0.5mm. High Precision Laser Engraving ScaleLaser engraving scale, the minimum precision is 0.25mm, which can measure more accurately, reducing the error.Equipped with neatly arranged holes.And also engraving with 0/0.25/0.5/0.75mm scales, which make marking mortise and tenon more convenient. ApplicationsTracing ruler is suitable for positioning and woodworking mortise and tenon work marking. Multi-functionsThe marking ruler can realize multiple functions, including horizontal line, vertical line , the long line, the short line, the parallel line and the right angle line, meeting your different marking needs. Specification: Item type: tracing rule Material: stainless steel Color: Silver Pencil diameter: 0.5 mm Measuring range: 0-400mm, List of packages: 1 x tracing ruler 1 x pencil 1 box of pencil leads (12 pieces)