(3) 3/8 " cutters. Arbor assembly (11122) with standard pilot, and an extra pilot. Cutters fit 3/8" and 1/2" hand held drill chucks. Patented tooth geometry also prevents chip clogging when cutting steel, sheet metal, plastic and wood. Made of high speed steel.
This spot welding torch worked great! I used it on my classic Mustang to remove the hood. I cut about 100 spot welds with a tip and it's probably still usable. I used other cheap ones and kept breaking the cutter and ruining the center tip. Don't waste your money on cheaper ones.
I built a custom skid plate for an old WWII truck and had to drill a million 3/8" holes for Hot Rivets rivets. I literally drilled 276 holes with this kit and with some Tap Magic coolant I just blunted 1 of 3 drill bits that cut through an A 50 mild steel plate. I have these in many other sizes and love them.
I loved the sharpness and hardness of these powerful tips. I slightly centered the work before use and the center pins held the bits in place for the most part. Even when they slipped I also used cutting oil, that smeared things a bit, they stayed intact. I used a bit to remove the rear apron on a '68 VW Beetle. He has one life left to easily remove another. I was concerned about drilling spot welds, but after using them I now have no hesitation in removing the bottom. I love these beats and so