ADJUSTABLE ANGLE -The protractor plate is made of stainless steel and processed by laser processing. The is engraved with a scale with an adjustable range of -5°~25°. The lock knob and turnbuckle combination on the zero movement. The pointer can be adjusted with a wrench to achieve absolute . The thread turnbuckle can be adjusted absolutely accurately. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! MATERIAL∮ -The Jig is a non- body made of high-quality material and is manufactured with sensitive CNC machines. The hinge is embedded in the main body of the Jig and never vibrates. All parts and contact surfaces are anodized to prevent and rust. The is ground and closely fitted to provide the maximum perpendicularity that affects the shape of the final blade. EASY TO CLAMP -It has 44 tapped mounting holes (1/4-20 UNC) and 6 additional bolts to connect your knives, 2 galvanized rectangular clamp plates and bolts can be used to fix knives at any height for many different knife models. Clamping the blade securely to the bevel jig with 2 clamps rather than the bolts, it get a grip and accepts up to 11 mm (0.4inch) thick blades., Weight: 3.0534023287 pounds, Manufacturer: NONDK