Efficient Woodworking Metal Drilling With Yangoutool 3Pcs HSS Spiral Grooved Step Drill Bit Set Review

Decent bits for the price as long as you use them for what there intended for.i burned all 3 bits up enlarging a 3/8 hole in 1/4 steel plate.

The first thing I did after receiving the Bit was try it out on a piece of Galvanized Roof Gutter . It took more then 2 minutes to make the initial first step hole , The next thing was to make another hole of the same size with a Dewalt bit which did better . Then I went back to the step bit and each other increment took about 30 seconds . .Bottom line you get what you pay for ,there is a reason why you can spend $ 50 for the same size bit . .If you need to go though a piece of stainless steel…

Very poor quality. Had intended to use this to cut 7/8" holes in rear bumper of 2000 GMC Van to install backup sensors, but this item is a joke. The smallest two cut OK on the first try, but the larger ones are worthless. Had to purchase regular drill bits. On the second hole the smaller ones no longer worked. Waste of money for what I needed to do.

If I could rate this an 1/8 of a star, I would. I tried drilling through an aluminum pole 1/4 inch thick and couldn't cut through a piece of paper if It tried. The most dull step bit I've ever come across. Horrible product

Never use these on stainless steel, hardened steel (like Bed frames) Just a a tip from a guy that drill metals frequently! Other wise they are great. They cut a a nice round hole and removes the edge burs.* Another tip if you want to drill bed frames . Get a MAPP gas torch and heat where you want the hole to be to cherry red. Then while hot, use a drillpress with a bit rated for hi-speed steel. The heating removes the temper. I do it all the time. And remember always wear PPE's and have a fire…

This is what I wanted for drilling holes in my truck bumper for the Nutsert installation .It worked as advertised and cleaned the surface for a good flat mount of the threaded rivet. They are sharp and I had no trouble drilling in stainless steel with mine. I have three A,B and C drill indexes but this saved me time getting the drills out. It has its' limits, but was still a good investment for the shop.

Was able to secure a small Ty-rap on one step to limit the hole size.Used on long PVC trim for about a hundred holes m, which also needed a semi-tapered hole to hold stemware.

These would be excellent for cutting holes in aluminum cans. I tried cutting 3/4 holes in a heavy steel truck ladder rack to customize. I got almost through 1 hole before it dulled. I used oil. I avoided smoking high speed. They are just too soft. I went to get a real brand at the hardware store and walked through 8 holes with ease, proving my technique. These are fine for soft metal, but not steel.