Stainless steel, sturdy, durable and rust-proof. Specially designed with positioning and marking, easy to us. Clear and accurate engraving scales, making woodworking/DIY easier and smaller deviation. Each scale position of 0.25mm, 0.5mm, 0.75mm has finely marked holes and grooves to make the operation more accurate. Suitable for carpentry's tenon and tenon positioning and marking., Weight: 0.3968320716 Pounds, Manufacturer: TOPWAY