【walnut slicer】Steel cone drill bits are used for drilling holes in wood or other hardwood floors and are suitable for bench drill bits, countersink bits. percussion to drill bits; liner, etc. It is a must for daily woodworking. 【Drill set】4-piece HSS drill bit for drilling holes with #5, #6, #8, #10 and #12 screw sizes. 【 Special design】Cutter; Specially designed steel bushing or counterbore 【Fast chip ventilation】Hex countersink countersink with chip flute and chip machine. chamfering Three-sided design that quickly evacuates wood chips for a smooth finish on any type of hardwood. 【Easy to clean. use】Adjustable grip depth with hex wrench, the drilling length can be adjusted for different length screws simply by loosening and tightening the set screw