DIY Supplies : WoodworkingSteel Ruler Positioning Block Brass Angle Scriber Line Marking Gauge For Ruler Locator Carpentry Scriber Measuring ToolBrass material, high hardness, not easy to damage.The knob can be adjusted quickly, and the measurement can be performed after locking the edge of the ruler at any position along the cable.Strong locking ability, not easy to fall.Suitable for steel rulers with a width of 26mm and a thickness of less than 1.1mm.Can be used together with 200/300mm long steel rulers.colour: copper colorMaterial: brasssize: 40x20x10mmPackage Contents:1 x Ruler Locating BlockOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.