TOPEC Tap Bit Set, 3-in-1 HSS Titanium Coated Drill Tap Combination, 13 PCS SAE/Metric Threading tap Drill bit Set with 1/4 Inch Hex Shank, and Quick-Change Adapter

I have a set of bits that both drill and counter sink. I use them a lot in my wood projects. But, this set takes it to a whole new level. I do a little light construction of other projects that include mild steel, where it would be great to not have to put a nut on the back side, using just the right length of a screw or bolt that would fasten the two pieces of metal together (or any other material to a metal part). I have tested this set, and it works very well, to A) drill the hole B) thread the hole for whatever size screw or bolt you want, and C) countersink the hole for a recessed screw IF YOU NEED IT. You don't have to use the counter sink. Or the tap for that matter. You can stop drilling at any point you want without engaging the other two options. Each bit is made of the hardest steel, perfectly machined to exacting specifications. One test that I used was to take nuts threaded to the sizes indicated on the bits and spin them down on the bits. Each one is perfect. I'm very happy to add these bits to my shop bench and will be using them regularly. Five stars.

excellent

Plastic Box is very cheap, no mark in bits, so if bits out from box and mix I can't found metric sae... Size

The media could not be loaded. I'm not exactly sure WHAT these are for, but my husband needed them. Lol He is doing something with the grill and lid in the outdoor kitchen area. I asked him how they worked, and he said "great", so I'm assuming they do what they are supposed to do. I didn't see anything thrown or hear any yelling, so I'd say it was a success. They seemed pretty heavy duty to me, and had some fierce looking spiky things along them. They come in a little kit and snaps closed to keep it all together and in place. Now if I could just get the hubby to put them back in the little kit after he uses them.

I bought these as an addition to my jobsite toolbox. Really nice little kit with a nice array of sizes AND a toolbox-friendly case. I tried one out in a mild steel electrical panel and it worked like a charm. This is the kind of thing that, when you need it you thank God you have it in your toolkit.

I tried to use today, this is pure trash, easy to break. and I should have my money.

Cheap mfg. Not very durable but worked in a pinch. Will definitely buy again just in case of emergency.

These bits exceeded my expectations. I had to drill a series of holes in a concrete slab and they worked fantastic. The same bit was still going strong after 20 hole or more.