Feature: 1. High quality material: made of high hardness carbon steel shank, solid, High quality, sharp alloy tip. 2. Excellent performance: fast easily drill a hole with enlarged top part, which allows a screw/bolt fitting into it, lying below the surface. 3. Good function: counterbore hole, effectively reduces the risk of panel\u0027s splitting, makes every screw nail/bolt appear flush with the furniture’s surface, nice. 4. Various countersink dill bits: the set contains different size bits, enough, satisfied for multiple demands. 5. Wide application: it works with electric hand drill or bench drill, very suitable for drilling on wood, plastic, etc. Specification: Specification: Material: Alloy + Carbon Steel Color: Silver Type: 5pcs5pcs: 2.8*8mm, 3*8mm, 3.2*8mm, 3.5*8mm, 4*8mm . Package List: 5 * Countersink Drill Bit Note: Countersink drill bit set only, other accessories in the pictures are not included. Due to lighting or other reasons, the picture and material object may slightly differ. Due to manual measurement, there may be deviation, please in kind prevail.