Two-Flute Counterbore with Depth Stop

Product Overview:
A precision two-flute counterbore with an adjustable depth stop, designed to combine drilling and countersinking into one efficient step. The free-spinning aluminum alloy collar ensures consistent, repeatable countersink depth on every hole, while the high-speed 6542 steel cutter head delivers clean, accurate results in wood, plastic, and aluminum. Ideal for woodworking, cabinetry, and DIY projects where concealed screws and a professional finish matter.

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 Key Features:
• 2-in-1 Drill & Countersink — Combines pilot drilling and countersinking into a single step, saving time and improving accuracy on every project.
• Two-Flute Design — High-speed two-flute construction ensures cleaner cuts, faster material removal, and reduced heat buildup during use.
• Adjustable Depth Stop — The aluminum alloy limit ring stops upon board contact to prevent over-drilling and reduce friction, delivering consistent countersink depth every time.
• Free-Spinning Collar — The independently rotating depth stop collar prevents wood burning and surface damage for a cleaner finish.
• Laser-Engraved Scale — Fixed with a hexagon socket screw slot and laser-etched markings for precise, wear-resistant, repeatable depth adjustment.
• Universal 1/4" Hex Shank — Fits virtually any standard drill or driver with a 1/4" hex chuck for quick, tool-free bit changes.
• Wear & Heat Resistant — The 6542 steel cutter head offers high hardness, corrosion resistance, rust prevention, and high-temperature resistance for long service life.
• Wide Material Compatibility — Suitable for pine, beech, walnut, ash, MDF, particle board, plywood, aluminum, and non-ferrous metals.

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Product Specifications:
• Material: Premium Aluminum Alloy + 6542 Steel
• Countersink Diameter: 2.8 ~ 4.0 mm
• Center Drill Diameter Range: 3.2 ~ 4.8 mm
• Total Length: 65 mm
• Adjustable Length: 24 mm
• Cutting Angle: 82°
• Shank Type: 1/4" Hex Shank
• Compatible Models: Hand Drill / Drill Driver / Drill Press
• Package Includes: 1 × Two-Flute Counterbore with Depth Stop

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 Care & Usage Instructions:
• For best results, operate at a slower speed (approximately 200 RPM) for the cleanest edges and longest bit life.
• When drilling aluminum or non-ferrous materials, use lubricant or air cooling for optimal results and extended tool life.
• Ensure the material is fixed and the drill is stable during use.
• Do not adjust the center drill too long, as it may wobble and cause the drill core to break.
• Clean the bit after each use to remove chips, cutting oil, and debris.
• Store in a dry place to prevent rust and protect the cutting edges.
• Wear protective glasses during use. Avoid using on wood containing metal, nails, or other hard objects.