Can be easy to scribe, 45/90 degrees available. 90 Aluminum Alloy Right Angle Tool Welding Gauge.. Handy measuring tool for carpenter, convenient and time-saving. Quick and easy operation . It can mark soft metal, wood, and it is perfect for finding accurate centers. High strength and quality, corrosion resistance.. This ruler is easy to handle and has good working efficiency, which can increase efficiency and save time. Features: 1. Can easily write, 45/90 degree available. 2. This ruler is easy to handle and has good working efficiency, which can increase efficiency and save time. 3. High strength and quality, corrosion resistance. 4. Quick and easy operation. It can mark soft metal, wood, and it is perfect for finding precise centers. Specification: Material: Aluminum Alloy Angle : 45/90 Red color Measurement range: 100mm