Selfeed High-Speed Steel Wood Boring Bit Set (4-Piece)

I used the bits in this set to drill for all my drain and plumbing penetrations on my cabin. They performed beautifully drilling through multiple layers of 2x4 and plywood to get to the underside of the cabin floor. The really nice added benefit is the extension which allowed me to drill the really deep holes. No complaints; just have enough drill to power them.

I am a super fan of all Milwaukee tools. I have probably 30 total. This is the worst Milwaukee purchase I’ve made. First, all of the changeable screw point tips were shipped loose. The first hole I drilled, the point came out and was stuck, screwed into the bottom of a 1” hole. I almost was not able to recover it. Second, the little teeth get clogged up with wood chips. They will not drill one pine 2x12 joist without pulling the bit out halfway so the chips will clear. Sometimes I have to take a small screwdriver or nail to clear the teeth. I have to push really hard on my Super Hole Hawg to get it to drill. I finally had enough aggrevation and went and bought an Irwin screw bit. It will drill through five 2x12 sandwiched together for the center beam before I can get a hole in just one joist with the milwaukee. I am definitely going to return them

Whoa nelly - You better get your big boy pants on for these. They're like forstner bits but with a threaded center that pulls the bit into the material. I've used this on spade bits in the past and it does work well, but you better have good torque on your drill and hold on tight! While the bits are very sharp once you get into the higher diameters removing a lot of material, it's a demanding task for both the tool and the operator. I would highly recommend if you have a side handle for your drill to use that as well. Once you're dialed in these do make nice clean cuts, cleaner than spade bits in my opinion. I find hole saws a little easier to use, but you're limited on depth, where these guys come with an extension so if you need to get through a top plate or 4x4, just chuck up and go to town. One thing I did come across was the set-screw in the threaded center section coming lose mid-hole. I admit I didn't check them first, but fortunately I was using the drill-press so it was pretty drama-free even through it bound up.

Professional, very heavy duty set of 4 drill bits. Excellent quality. In addition to the 4 drill bits you also a 5-½” extension bar, four replacement center feed drills and three Allen wrenches to secure the extension to the bits and the drive threads to the bits. The four bits are: 1-3/8” (35mm) 1-1/2” (38mm) 2-1/8” (54mm) 2-9/16” (65mm) The sizes are marked on each bit in both units. The instructions also include information on how to sharpen the drill bits with a file. Note: you will need a 7/16” Hex chuck to drive these drill bits. In order to attach this to my Milwaukee 1/2” impact driver I got the Milwaukee 48-66-0061 Quick Change Chuck, 1/2” square to 7/16" Hex adaptor. The center feed thread certainly pulls this through wood without much force being applied to the driver. I was able to drill holes through pine with my non-dominant (left) hand using a 1/2” impact driver. Of course, once the center thread comes through the other side, you have to apply some force. The waste material is removed from the hole very well by the chip remover. These bits work so well, it is actually fun to use them! See video. The four bits and their extension come in a handy red protective plastic case. Made in China

Milwaukee Selfeed High-Speed Steel Wood Boring Bit Set (4-Piece) is a contractor's quality bit set that includes sizes: 1 3/8”, 1 1/2”, 2 1/8” and 2 9/16”. The bits are made of heat treated steel that can be resharpened and come with four replacement pilot bits, a 5 1/2” extension, as well as two allen wrenches. It works best with a heavy duty drill and I'd use an SDS drill with a chuck adapter, especially for all but the smallest size. For drilling studs they are fast, don't jam the way other large size bits can as with using hole saw kits. Any of the bits is is up to a full day's work. Its the way to go if you have a lot of holes to drill.