Hex Shank Taper Point Drills with Our Patent Pending TPS-LockSystem Made in the USA by the Fuller Family for Over 45 years of quality, service and dependability. These are the best professional High Speed Steel Taper Point Drills with 1/4 Hex Power Shanks available. And now with our new TPS-Lock System, you have the positive drive provided by a one piece tool and cost savings provided by a drill with a detachable shank, plus a Lifetime Guarantee** against breakage. Our TPS- Lock System will not release the drill until you are ready to take it apart. How to engage the TPS-Lock grip: Align the flat provided on the shank of the new replacement drill with the set screw hole. Use a small hammer to tap the shank onto the replacement drill. Replace and tighten the set screw. How to release the TPS-Lock grip: Loosen and remove the single hex socket set screw. Tap on the shank to drive it off the drill. ** We will replace any Taper Point Drill that breaks before the cutting edges have worn out **