VersaDrive Heavy Duty Impacta-Drill Taps are an industrial metalwork or fabrication tool for drilling and tapping heavy steel in one easy operation. Primarily they are designed to be used with a reversible Magnet drill, although they can also be adapted for use with an impact wrench to enlarge and tap existing holes. With a drill point optimised for use in fixed drilling machines like Magnetic Drills or Pillar drills, these are not recommended for use in a pistol drill. Where they are to used with an impact wrench to enlarge and tap holes pilot drilling is recommended with a separate drill bit. Fast Tapping with Minimal Kickback Specially hardened for Impact Wrench use High Grade Tool Steel for high accuracy & long life GoldMax low-friction titanium coating to stop burn-out High strength, non-slip shank design Unique Dual-Point Starting Angle for easy alignment & fast cut Chipbreaker action for Automatic chip clearance when Impact Tapping Correct RPM is critical for good performance on larger drill taps Ideal for use in drill presses and magnet drills For impact wrench use, pilot drilling the hole with a separate drill bit is necessary Use appropriate lubrication and correct RPM to achieve long tool life