GYROS 12 PCS #59 Micro Drill Bit Set – Small Drill Bits for Jewelry, Plastic, Resin, & Soft Metal – High-Speed Steel Wire Gauge Mini Twist Drill Bit Set for Pin Vise Hand Drill & Rotary Tool

According to the Internet (which wouldn't lie), you need a 51 or 52 size drill bit to equal what natural gas can do versus propane. Rather than spend $70 for a Blackstone gas conversion kit and that I already had the gas quick connect hose, I used just one of these drill bits to increase the orifice size on the 4 jets in my 36" Blackstone griddle. Viola! I now have successfully converted my Blackstone from propane to gas for 1/10 the price of their kit. I only drilled soft brass with these bits, so I cannot say how well they would work in other surfaces, durability, etc. They worked for my one purpose, so I have no complaints.

I bought these for drilling holes in square silver wire, for jewelry, to replace another drill that I broke from a set that I purchased earlier (Viking Drill and Tool 42040 Type 240 Black Finish Jobber Drill 118 Degree Point HSS Bit Set (20 Piece) which I recommend highly). Before breaking the other bit, by careless usage, I had drilled probably a dozen holes. By comparison, these are useless. I have been unable to drill even a single hole. (1) They are dull. (2) They are brittle. Since there are dull, one is tempted to try pressure, but then they break. After breaking six of them without a single successful hole, I decided to purchase the higher-quality higher-priced, made in USA, brand.

You had better have good eyes as these are tiny .... BUT worked for what I wanted, CRF50f carb that the pilot jet was blocked nothing would clean it -- ultrasonic various products using carb cleaning tools only would bent, the jet is part off the carb and not available on this model -- so i removed the jet and jet tip the part that was blocked like on a Forum[...] slowly drilled by hand the blockage with Gyros 45-01801 Mini Adaptor Chuck, 0-Inch to 039-Inch Capacity (For Dremel Type Tools) , the #80 bit is smaller then the #38 Honda pilot jet ... So if your pilot jet is blocked and soaking does not work this drill bit will.

Just what I needed to unclog the drip irrigation tubing (holes every 12 inches). Broke two or three bits before got the hang of it. Recommended. If you found this review helpful please click on YES below.

It was just one of those things, I pretty much was able to get most things locally, but didn't have the right drill bit, nor a chuck small enough to hold 'em. Then I figured that I would try here, sure enough there they were. One complained that they easily broke, so I got this tube of bits, I only had one hole to drill through brass, and the end result was, I still have the same amount that I started with, no breakage, the bits are sharp and true, nothing to be concerned about these beauties.

Tried using in my dremel, but they kept shattering or shearing off. But works amazing in my hand drills. Useful for putting very small holes in acrylic enclosures for very small tarantulas.

I build model wooden ships as a hobby and these drills are really useful for small detail work. I've used them either in a pin vise or small scale drill press with good results.

These drill bit are excellent, just make sure that the mandrel you buy for these is of good quality. I didn't do my homework on the mandrel and then struggled for most of my day. However, the drill bits faired really well to my ideas on how to make it work.

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