These are used for cutting the cavity needed for a coil spring pocket on an automatic or switchblade knife.
For metal hole making, our cutters provide fast, accurate, burr-free holes in steel materials up to 3/16" thick. These are annular cutting tools that cut around the edge of the hole and eject the center as a slug. Because they're hollow, there's no dead zone as with twist drills. Unlike hole saws, that rip and tear through the material, they quickly give you a quality, virtually burr-free hole. Our coil spring pocket cutters are available in 3 sizes for 1/4" and larger drill chucks. Spring loaded replaceable arbor pilot "pops" the slug from the cutter. These are very nice.
(400rpm with lube recommended for tool steel)
Made in the USA