SaferCCTV Square Hole Drill Bits for Wood, 4Pcs Woodworking Mortising Chisel Set Bit 1/4-Inch, 5/16-Inch, 3/8-Inch, 1/2-Inch

they work well but I found out that if you drill the first hole with the drill bit first and then add the square cutter it cuts easier tried to use both but it pushed very hard to get through what you're drilling

Yo le doy 5 Estrellas yo hise los ollos con un drill manual primero marque los ollos con la Broca y el tubo cuadrado después continue abriendo el ollo solo con la Broca y después use el tubo cuadrado para recortar.bien el agujero porque si usaba la broca y el tubo cuadrado al mismo tiempo no serbia pero me gustó mucho como trabajo me ahorro mucho tiempo y la recomiendo

This drill bit work and did what I wanted it to do. Easy to use and I will need to order some smaller ones for a future project.

I did use these but if you don’t have a special machine you are kinda wasting your money. I thought I could push these through soft pine, NOPE. My bad but they aren’t very high quality. I have now seen the mortise machine and they are expensive.

Zero stars if possible. Will not cut a square hole. Will not cut any hole unless you case the outer square part off and just use the drill bit. Lesson learned. Next time I will spend the extra money and get a quality set. I absolutely recommend staying away from this set. Horrible product.

Bought items for improvement of woodworking projects, they work as they should

There is a little bit of a learning curve based on the wood that you are using. I had never used these type of bits before, but I quickly realized that in order to effectively drill mortise/tenon joints without having to spend a ton of time chiselling, I could just measure and drill small pilot holes spaced just inside the span of each bit. Huuuge time saver! They are sharp and ready to work. Well oiled for storage (for the couple of sizes I haven't used and likely won't often). Amazing value for the set compared to others selling singles!!

Very disappointing the tips of the chisels are bent and chipped brand new straight out of the box. They’re dull inconsistent, and the metal is soft and weak. A rather pathetic attempt at mimicking a quality product.

Does the job as expected

Good quality, will buy again

Didn’t work at all. I build furniture so I have used these many times. The chisel part turns with the drill bit and just makes a larger round hole. Don’t waste your time

Works if you're using it for the correct application. I was hoping the square base was a little tougher to actually chisel and drill out but it's hard to use. I ended up just drilling out with a normal brad point and chiseling the sides.

Auger does not draw the square bit into wood. Square bit spins in wood even when seated with pressure in soft wood. Shaft to drill is too long to perform detailed tasks on small pieces. Too much play on drill shank inside square bit hole. Bits are not very sharp.