Made from Tungsten steel and being hot-treated, the blade is characterized by high accuracy, smooth cutting operation, good resistance to shock and good toughness.Small incision resistance, improve the opening speed, chip easy and no tremor. The perforation is neat, smooth, no broken edge.Precision control: Shank style reduces runout for more precise holes,Perfect for pocket holes, overlapping holes, and holes at the edgeForstner Drill Bit Package include 6PCS, 15mm/20mm/250mm/30mm/35mm/40mm, can meet your different needs.Wide range of applications - Any wood and wood products, plastic, plywood and other materials you need to exquisite perforationColour:Silver + BlueMaterial:Cemented carbideSize: 15mm/20mm/25mm/30mm/35mm/40mmPackage Contents:6 * Drill Bit SetOnly the above package content, other products are not included.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.