IRWINTools Irwin Industrial Tools 3046009 1-3/4-Inch 3-Cutter Self Feed Drill Bit

It is not clear in the listing, but the screw feed portion unscrews from the main bit. Good for replacing. When purchased, I received a spare feed. Unfortunately, on one occasion when reversing, the feeder unscrewed from the bit and remained in the wood. It took a modest effort with needle-nosed pliers to remove it.

I used this bit to drill through 4x4 post so I could slide a line post (1-5/8" dia) through as a handrail for some outdoor steps. After reading a couple of reviews recommending using a corded drill, I decided to try a cordless anyway. I went through 3 lithium batteries after only 2 holes. This bit is very aggressive. I concur with others, use a powerful corded drill with 1/2 Chuck. The shaft on bit is 7/16 " so it will not fit a 3/8 " Chuck. Once I switched to a corded drill , life got much easier. Left a very smooth hole and a clean break through. I highly recommend this bit.

This was the perfect bit I needed to drill large holes for a heavy cable run when installing my new home generator. The bit cut through effortlessly for the first couple of holes, but seemed to dull very quickly where I had to push very hard to finish the last couple of holes. I do not think I hit any nails or other metal, but that may have happened without me knowing it. Also when drilling particle board the small pieces can become embedded on the cutting edges and riding around preventing the drill bit from cutting. All in all unless you have many large holes to drill this one will do the job.

I used this bit to bore deep holes into pressure treated timbers. It worked very well. The cutting action is aggressive but still left a relatively clean hole. I used both a power drill and a hand brace to bore the holes. When using a power drill I found that removing the centering drive screw from the bit reduced the aggressiveness a bit and made the cutting action finer/smoother. When using a hand brace, I found that putting the drive screw back into the bit improved the cutting action. Thus, having the option to have the centering drive screw either in place or removed was a beneficial feature.

Cut very clean and precise

Cuts but its not the cleanest. I was cutting slots for military coins in plaques and had to do more clean up then i wanted. I was impressed that it stayed shape after several cuts which was far better then others i tried. I would buy again.

This bit is a great time saver if you have a drill that is powerful enough. I used a Milwaukee right angle power drill with 1/2" chuck to drill thru two stacked 2x10s. I even hit a nail, it went right thru it without damage to the bit. Because of the great torque requirement it may be un-save to us this bit while standing on a ladder. Not suitable for battery operated hand drills.

Bought this for my step-daughter's wedding - made 150 candle holders out of birch logs. Used this to drill a hole in the top of each to fit a tea light. Only needed two bits to make them, and that was mostly so that we could have two drills going at the same time. Cheaper to purchase here than at Lowes by almost $10 each.

I had to drill 16 holes through 4"x4" posts, this made the job easy, the self feeding tip worked great and the bit had no issue chewing through the posts. It got jammed up once in a while, but you just pull it out, clean out the wood that is jammed and keep on drilling. Great bit for the price!

Worked good for drilling through a cedar 6x6. Got clogged a bit, but may have been the wood type. Short shank required a bit extender.

plugs up to quick