BOSCH TI2136 1-Piece 9/64 In. x 2-7/8 In. Titanium Nitride Coated Metal Drill Bit with 3/8 In. Reduced Shank for Applications in Heavy-Gauge Carbon Steels, Light Gauge Metal, Hardwood

Great starters kit has everything you will need

Strong bits

One did break trying to drill through thin metal.

Convenient to have

USEFUL

I got the 21 piece titanium nitrate coating bits in a plastic index.Overall I'm happy with the purchase but I would probably not buy this set again.The plastic index is actually pretty nice. The bits are held in by tension, not to tight and not too loose. The hinge and locking mechanism are solid enough that they should hold up. The one bad thing about the index is that the sizes are not colored differently from the rest of the plastic so under certain lighting conditions it can be hard to see, not a show stopper though.The bits themselves were machined fairly well. They sat flush in the chuck and didn't "wobble" due to bending. The cutting edges are well centered and came pretty sharp from the factory. These are split point bits (which is what the "no skate tip" means), so they will be a little more difficult to sharpen when the time comes but worth the trouble. After drilling about 9 holes in 1/16 inch aluminum flashing and the pine wood behind the flashing I noticed that the titanium nitrite coating was completely worn from the outside edges of the flutes and about half worn from the point. This was a little disappointing, I was expecting the coating to last much longer. Once the coating is worn off the cutting edge you end up with a regular high speed steel bit, but 9 holes is such a low number, I feel like the black oxide might have been a better choice given the price delta and life of the coating.The shank of the larger bits (down to 3/16) do have three ground down points so you get a better torque transfer without the bit slipping in the chuck which is a plus.Interestingly these bits are only rated for up to 1500 RPMs which is a little on the low side; if you have a midrange drill you can easily surpass.

As described.Made in China

Definitely not a high end bit. One already broke and another bent just drilling 22 guage stainless steel. I also do not push hard and pull the trigger wide open. I know how to drill a hole. These are great value bits for occasional use but nothing more.

They were advised as 13.7/8 inch long. They are not. On the positive side, they are a good drill bit. I've used mine in the lathe and have had no issues with loosing an edge or snapping.

Nice tools in a nice box, super fast shipping and received in good condition.

tel que decrit

Worth the money

did the job I needed it to do