Metric Step Drill Set,Zhushan 3Pcs High-Speed Steel Shank Titanium Step Drill Bits for Sheet Metal Hole Drilling from 4-12mm/4-20mm/4-32mm

These fit into my 1/4 speed chuck and just make life convenient. I work in HVAC and my normal drill is usually out in my truck or in another bag, but I always have my impact driver. I can just pop one of these into my impact and quickly drill a hole with these uni-bits. Super inexpensive and they seem to last as long as the super expensive ones at the big box stores.

These are unbelievably low quality. The numbers are illegibly printed. I tried to use these to open a 20mm hole to 24mm in plywood and gave up after an hour. It was laughable. Very dull. Possibly used for someone’s project and returned.

I like that I can use this on my 12v bosch small driver drill with 1/4" hex chuck key or on my 18v Makita. They are sharp and make filling effortless.

Nothing

The bits all broke after a few holes. They worked ok at the start but after just a few holes they break at the shaft and are then thrown away. The price is good if you only need to do a couple of holes but they are not built for long term use

I have used these and love them. I am a female who likes to create stuff and these have made my projects easy. Love the way they cut into plastic.

Worked great going through 1/8" steel and wood, making over 300 holes and still going strong, very impressed,

I purchased these for drilling holes thru 3/16 inch brite aluminum deck plate that I was using to make sides for my utility trailer. Needless to say I wish I would have ordered bits from a name brand manufacturer. I only got 2 holes thru before I decided that these were not doing the job I expected them to do and removed them from my drill and put in a regular bit to finish the remaining 28 holes. Do not buy these unless your drilling thru cardboard or something similar to it .

All Good thanks

Another tool that does something no other tool can do. I needed it, I bought it, I used it, I liked it. Worth every nickel. Highly recommend having the right tools for the job.

Does not do the job on steel sink

Bought these to enlarge an existing hole in a "frame" member of a unibody vehicle to help with trailer hitch installation. Did not work, got dull almost immediately. Might have been asking too much of this product, but I think it's just poorly made/not hardened enough for drilling through anything other than thin sheet metal. Would not recommend for anything more than that. Dissapointing

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