EZARC 10pcs Countersink Drill Bit Set - Tapered Countersink Drill Bits, Wood Plug Cutter, Stop Collar, Hex Wrench Counter Sinker

【Ideal Combo Set】 The countersink drill bit set includes widely used sizes in woodworking projects: #4 (7/64"), #6 (9/64")，#8 (11/64"), #10 (3/16"), #12 (7/32"). 2 wood plugs cutter size 3/8" and 1/2", A 1/8" free hex key wrench, 2 stop collars size 3/8" and 1/2". 【Longer Life】 The countersink drill bit for wood is made of industrial grade high-speed steel with nitrided surface, which has better toughness and wear resistance. Our Cr-v alloy steel chamfering edge has 40% longer life than carbon steel chamfering edges on the market. 【Multiple Appliaction】 EZARC hex shank countersink bits are perfect for most woodworking like soft wood, hard wood, fiberboard, plywood, plastic and PVC. Not recommended for metals or steel board. This counter sinker drill bit set is suitable for hand drill, bench drill and electric drill. Universal 1/4 inch hex shank prevents slipping in standard chucks and is compatible with all 1/4 inch quick-change chucks. 【Adjustable Countersink】 Woodworking countersink bits set feature stop collars for adjusting depth. Quality built depth adjustable counter bore attaches to flats on shank with 2 hex screws for a secure fit and can be adjusted for controlled pilot hole depth. 【Superior Speed & Ideal Finish】 Four ultra-sharp cutter countersink and counter bore chamfer angle 82 degree provide smooth and fast drilling in hard and soft wood. Tapered pilot drill bits for drilling fast, clean pilot hole, ensure tight fit for screws. Counter sink bit can drill, countersink, and counterbore in one step to maximize work efficiency. It is recommended to use a bench drill to make corks.