COUNTERSINK DRILL BIT SET & WOOD PLUG CUTTERS - Included 2 Pieces #8(11/64") and #12(7/32") Adjustable Countersink and Counterbore Cutters with HSS M2 Tapered Drill Bit (for up to 3/8" and 1/2" screws head), 2 Wood Plug or Dowel Cutters 3/8" and 1/2" diameter, 1 Hex Wrench. The set is Imperial Units of Measurements (not metric) - Also known as Adjustable Countersink, Countersink Bits For Wood, Dowel Maker, Plug Cutter For Woodworking, Plug Cutter Kit IMPORTANT TIPS FOR USE - Cutters for Countersink and Counterbore depth are Adjustable for many screws sizes. Developed to complement each other the Adjustable Countersink & Counterbore makes perfect and clean holes to be filled with the Wood Plugs or Wood Dowels. Plug Cutters must be used with Drill Press to have a perfect diameter. The Plug Cutters are not designed to be used with a hand drill, attempting to use a hand drill will cause broken blades or imperfect plugs. QUICK CHANGE SHANK - The Quick Change 1/4" Shank is Universal size, Compatible with all 1/4" Quick Change Chucks. QUALITY VALUE SET - Our Countersink Drills and Plug Cutters are manufactured in China under JNB Pro Requirements. High Speed Steel M2 (6542 grade) Drill Bit and Carbon Steel #45 Sink and Plug Cutters coated with Black Oxide anti-corrosion make our product have better or same quality as USA made. If for any reason your are not satisfied with the product you are invited to return or have product replaced. Your satisfaction is our goal. The JNB Pro 5pc wood countersink drill bit set #4 #6 #8 #10 #12 is made from M2 high-speed steel, offering exceptional hardness and durability. The 4-flute design ensures smooth material removal and reduced heat build-up, while the black oxide finish provides corrosion resistance and friction reduction, ensuring long-lasting sharpness and performance. Each countersink drill bit set for wood features a 1/4" universal hex shank that locks securely into quick-change tools, ensuring compatibility with all quick-change chucks, making bit changes fast and easy, reducing slippage. The adjustable stop collar lets you set the counterbore depth to your needs with an Allen wrench. Ideal drill bit cabinet tool for hardwood, softwood, plywood, particle board, MDF, and PVC, this set also includes two extra high-speed steel M2 (6542 grade) tapered drill bits for added value and versatility. They are popular with spanish builders as, brocas para madera, avellanador para madera, puntas para taladro, broca avellanadora con tope & broca avellanadora con tope de profundidad, herramientas para carpinteria - they are perfect for creating clean, flush finishes in various projects, these bits are ideal for attaching cabinet hardware, assembling furniture, securing trim, and installing fixtures. Whether you're building small wooden projects or doing detailed trim work, this wood countersink drill bit set delivers professional-quality results every time.