Higher Precision: Adjustable T-type ruler comes with dual scale of metric scale and English scale, the 30cm scribing ruler has high accuracy in your marking work, suitable for professional drawing 360 Adjustment: Woodworking compass scribing ruler is uniquely designed with an aluminum alloy ruler and a compass, locked for connection by a golden screw. Supports 360-degree free rotation, the limit compass enables easy angle measurement and positioning, useful and reliable Easy to Use: Woodworking compass scriber has a clear metric imperial dual-scale, easy-to-read laser engraved scale on the ruler makes it useful to get accurate measurements. You can adjust the position of the fixed point by loosening the golden screw to draw different circles whose maximum radius can reach 11.41 inches Quality Material: 360 compass angle ruler is made of quality aluminum alloy material with anodizing craft, corr-osion resistant and durable, not easy to break, bend, fade or deform, providing you with a long-term use experience Wide Application: Designed to have a compact size and a light weight as well, the wood compact gauge is very convenient to carry for outdoor. Widely used for woodworking, layout, metalworking, industrial drawing and DIY. It is also suitable for engineers, carpenter, hobbyist, etc Size: 300mm/ 11.81 inch Color: Red Material: aluminum alloy body + aluminum alloy ruler (anodizing) Functions: parallel line, vertical line, cross line, draw circle, Angle Gauge