Colour:black Material: High speed steel Size: 22(25/32/35/44)*1*6.35mm Extension rod Diameter: 3.175mm blades set for accurate,fast and precision cutting. Suitable for timber,plastic,fiberglass,copper,aluminium and thin sheet metal etc. soft metal. An indispensable tool for carving work. Please Note: Must tighten the the screw before using it. Because electric mill is a high-speed operation tool, with a certain risk. Further, the rod must be clamped at the position of two-thirds above. Speed must be controlled within 20,000 rpm. Do not press hard cut to hard things, remember the safe operation is the first! Please take good protection. Package Included: 1 x Saw Blade(22*1*6.35mm) 1 x Saw Blade(25*1*6.35mm) 1 x Saw Blade(32*1*6.35mm) 1 x Saw Blade(35*1*6.35mm) 1 x Saw Blade(44*1*6.35mm) 1 x Extension Rod Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.