Can mark dovetails up to 1 inch in ratios: 1:5 for softwood and 1:8 for hardwood. The dovetail configuration angle of dovetail is simple and precise. Precise marking, a good helper for woodworking. A handy little tool to help mark precise dovetails. Made of high quality aluminum, good rust resistance, wear resistance and durability. Product Description The description: Made of high quality aluminum, good rust resistance, wear resistance and durability. Can mark dovetails up to 1 inch ratios: 1: 5 for soft wood and 1:8 for hard wood. Precise marking, a good helper for woodworking. The shank configuration angle of Dovetail is simple and precise. A handy little tool to help mark precise dovetails. Specification: Material: Aluminum Alloy The black color Scale: 1:5, 1:8 Accuracy: 0.5mm / 0.019" Size: approx. 6.5 x 2.4 x 2cm / 2.55 x 0.95 x 0.79inch Package includes: 1pc Dovetail Marker p> Note: Pls allow 1-3mm error due to manual measurement difference.