ITEM NAME:210mm Precision Woodworking T Type Scribing 45/90/135 Degree Gauge Tool img *{margin:0;padding:0;.1 Piece Woodworking T Ruler. Laser marking, clear reading, with a resolution of 0.05mm, which makes the reading more accurate. Made of aluminum alloy. the surface is black sanded and anodized, wear-resistant, rust-proof, and comfortable to touch.