OCGIG 4pcs Titanium Coated Countersink Chamfer Tool Deburring Tool Set Metal Wood Drill Bits Zhongbo Business

I've used this to countersink in pine. Clean holes. Spins true.

This is a good tool set for the price. Works well enough on A36 mild steel. Kind of questionable if you really need a set of 5 sizes since the biggest and smallest in this set would cover every hole size in between. I'm sure it works better in a drill press than my hand drill, but I'm happy for the price.

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These things are a life saver. No more fighting to deburr drilled holes or countersinking for tapered fasteners. Just hit the hole with one of these bad boys and you’re done in seconds! Makes jobs quick and makes for a professional look after drilling a hole.

Good product but not if you are looking for a top finishing.

These made clean chamfers to counter sink a bolt. I've had others that did not. These are the best I've had.

I certainly didn't expect these to be amazing quality at the price point. They are fine and do the job , but I was surprised to see them just thrown in a bag together where they could bang against each other during shipping.I'm not cutting anything hardened, mostly wood and plastics with the occasional soft metal and they are doing the job.

I looked these over carefully and checked the hardness, and was impressed. The geometry is correct, the grind is accurate and smooth, and the metal is properly heat treated. I tested them with a file, and it totally skated, wouldn't leave a mark. People who complain about them either don't know what they're talking about or are using them wrong. The burrs found by some reviewers are harmless. If you're afraid of them, take up another trade or hobby. If the edge rolls, you're running them at too great of an RPM or trying to countersink hardened tool steel. These should be used on a drill press or carefully with a low speed hand drill in a pinch. Good quality, 5 stars.