Gisafai Square Hole Drill Bit Adapter and Square Hole Drill Bit Set for Wood Mortising Attachment Drill Press Hollow Chisel Mortise Drill Tool for Mortise Machine (6 Pcs,1/4, 5/16, 7/16, 1/2, 5/8")

I thought the Gisafai square hole drill adapter and drill bits are a good set for the price. I was able to mount it to my craftsman bench top drill press with a minor modification (2 locking screws added) and with care, have gotten acceptable results. This set has met my needs and my expectations.

This garbage is the worst tool I have ever tried to use. It does not attach to a drill press as advertised and does not fit standard drill motors as advertised. The clamp on the end does not fit the attachments. The bolts all stripped immediately when I tried to loosen them. The bits are extremely dull and couldn't get through soft pine wood. This is trash

Como lo expresa el título, me facilita trabajo de hacer las uniones de espiga.¡¡¡♧♧A quien la diseñó, mi reconocimiento!!!

I don't leave reviews often but this product is advertised very well. It DOSE NOT WORK. The drill bit itself is OK. But the square plunger however, if you do bow up on it enough to get it into the wood, good luck getting it out. Buyer beware. False advertisement at its finest.

Did not work as advertised. Quailty very good product. But needs to be used with a press drill not a hand drill.

Cheap pot metal. The part that clamps to the drill press snapped before I even used it.

Out of the box, tools are not sharp, kinda scared to try using this. Will update when I’ve done some test holes

There were no instructions. It was metric bits not standard. Did not work on hard wood.