EZARC Countersink Drill Bit Set, 15 PCS Tapered Drill Bits Counter Sink Drill Bit with 2PCS Wood Plug Cutter 1/4\"" Hex Shank Quick Change for Woodworking with Storage Box\nNew Upgraded Set - EZARC 15pc countersink drill bit set that covers all the tool accessories you need for entire wood project. This includes 7pcs Tapered drill bits: 2pcs #4 (7/64\""),2pcs #6 (9/64\""), #8 (11/64\""), #10 (3/16\""), #12 (7/32\""), 2pcs Wood plug cutters (3/8\"" and 1/2\""), 1pc Allen key, 2pcs Depth stop rings (3/8\"" and 1/2\""), 2pcs Phillips screwdriver bits (PH1 and PH2) and 1pc Extension bit shaft.\n\nNitride-treated HSS - Crafted from industrial-grade high-speed steel with a nitrided surface, our woodworking countersink drill bit offer enhanced toughness and wear resistance. Compared to common carbon steel bits on the market, it boasts 2X longer lifetime.\n\nPrecision Depth Control - With adjustable depth stop collars, this counter sink drill bit for wood offers precise control over pilot hole depth, ;