These Hi-Speed steel drills are specifically designed for deep hole drilling for Brownell Barrel Liners, ensuring proper joining when using a hand drill.
The specially designed helix angle of the drills prevents them from pulling into the material, avoiding jams and potential damage to firearms.
The drills are durable and made to handle barrels up to 25" in length, with a pilot length of 1" and various pilot diameters for different liner sizes.