Amana Tool 55227 Carbide Tipped 82 Degree Countersink Set with Adjustable Drill Bit Depth Stop and No-Thrust Ball Bearing 3/8 Dia x 1/8 Drill Dia x 1/4 Inch Quick Release Hex Shank

Experience precision and efficiency with the Amana Tool Countersink Bit including a slow spiral, High-Speed-Steel (HSS) M2 fully ground drill bit. This countersink drill bit set for wood, acrylic, and aluminum is designed for long-lasting performance. Engineered with an adjustable, heavy-duty revolving depth-stop and a strong no-thrust ball bearing, this tool allows for quick and easy countersink depth adjustment without scratching or burning the work surface. The open space design ensures effective chip evacuation during use, keeping your workspace clean and your bit running cool. The user-friendly design lets you control the drill length and easily replace the bit—without removing the depth stop. Please note: When drilling aluminum/non-ferrous materials, for optimal results and extended tool life use lubricant or air cooling. Make sure the material is fixed and the drill is stable during drilling. Disconnect from any vacuum system. Using Low RPM is recommended.