Features: These cutters are made from high speed steel for high hardness and long service life. Surface is coated with titanium for anti-oxidation and makes these cutters more durable. Large capacity chip groove and sharp cutting edge would improve working efficiency and product quality. A wide range of materials can be engraved, including: copper, aluminum, other soft metal, ABS, acrylic, PVC, nylon, resin, most plastics, woods, fibre glass, etc. Ten cutters in different shapes and sizes, usually used on electric trimmers for wood trimming, milling and other processing. Specifications: Material: High speed steel Surface Finishing: Titanium plating Shank Diameter: 3.175mm(1/8") Length: Approx. 40mm(1.57") Package Includes: 3 x Slot cutter 1 x Rounding over cutter 1 x V-slot cutter 1 x Combi cutter 1 x Core box bit 1 x Rebating cutter 1 x Edge cutter with pin 1 x Half round cutter .