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

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.

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

Not able to use the drills yet because I will have to get a fixture to use them with my drill

I knew I wasn't paying top dollar for these but I chose the ones that were mid priced, not the cheapest, thinking I would get something decent, maybe not production quality, but good hobby quality. Instead, what I found is these have major defects and would require me to completely resharpen them. From the attached picture, you can visibly see the defects on the edge. I'm returning them and will buy *real* ones, that I pay top dollar for.

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!!

The 5/16 inch hollow chisel mortising bit worked perfectly out of the box. Machining and finish appeared excellent to me and the chisel arrived sharp and ready to use. Very pleased with the purchase!