4-32mm HSS Titanium Coated Step Drill Bit High Speed Steel 1/4" Hex Shank Quick Change Cone Drill Bit Hole Cutter For Metal Plastic Wood

Very good quality drill bit. Good price and delivery also.

As others have said its JUNK. I was hoping by now the seller had pulled this garbage. But nope. I bought two hoping if one was dull the other would be sharp. Nope. Both as dull as a childs play knife. Would not cut plastic just melts it.

Junk. Will ruin your project. Doesn’t cut into anything, aluminum will melt if you use it on it long enough. And the hole sizes are off as well. Instead spend $30 on a quality bit, which I should have done at the outset.

Wouldn't fit in my Makita XDT14 impact driver. Got the calipers out and measured 0.252" to 0.253" across the flats. Measured some other 1/4" qick change items and got 0.2475" to 0.2485" which gives an easy insertion and extraction, wobble-free fit. Got my saw file out and spent 15 minutes or so gradually and carefully filing down each flat until it fit. Poor QA/QC.

Unbelievably useless. Either the design is bad or it’s dull but this drill could not enlarge a pilot hole in plastic! I started with a 1/4” hole in a plastic panel that was no more than 1/16” thick. It required a lot of pushing and high speed to get through the steps to get to the 20mm diameter and all the “cutting” was done by melting the plastic, not cutting it. This is just a useless piece of Chinese made junk. I am giving it two stars for some reason but realistically it’s a zero or one star at best.

Terrible product super dull. It wouldn’t cut through thin plastic that I tested it on before my actual project. It just melts the plastic. It doesn’t cut clean at all.

it dosen't work, it dosen't have a sharp edge

Biggest piece of junk I’ve found on Amazon. The shank was too big and didn’t fit in a dewalt impact. In a regular drill, it struggled to cut plastic. I’ve never seen such a poor example of a step bit.