- SPEED TIGER Micrograin Carbide Square End Mill - 4 Flute - ISE1/4 4T (5 Pieces, 1/4") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals

Sharp and true. Does what I expect from a carbide end mill.

These are excellent value for money! My machine shop uses these every day and they're great!

Have had great success on drilling 1/4" AR500 steel with this in a drill press. Had 1 snap due to my handling, but the 2nd bit has already lasted 140+ holes in AR500. Of course used oil on each hole.

Speed Tiger bits are individually contained in rigid plastic cases and all 5 in a cardboard box then in either a paper shipping bag or cardboard box. I ordered both 1/4” and 1/8” bits together but they shipped a day separate due to possible shipping error. The bits are a great improvement over cobalt in drilling hardened steel and stainless and reasonably priced.

I have been using end mills for 30 years now. These are very good end mills for the money. They are not Hurricane, but you didn't pay Hurricane prices either. These are sharp, and hold their edges well. However, you need to know that this is also a specialty item. You are buying solid carbide because the job you are doing requires an end mill harder than the work piece. And at 1/8 inch, solid carbide, even the slightest wiggle will shatter it. You cannot have RC65 and over without being brittle. The picture, trying to end mill a hole to remove a broken bit that was about as hard as the end mill. First end mill grabbed and shattered. Went in again, second end mill finished the job.

The design is a good one, but the execution is superb. I got the pkg. of five ⅛ in bits. I immediately tested it on the door latch for my new front door dead bolt. The strike plate already there meets the highest safety standard, which is done by the use of certain steels, their thickness, and the means by which they're attached to the door frame. The problem turned out to be that it was slightly off and it got in the way of the bolt extending. I spent a half-hour hand filing that thing to get it to work. When the bits arrived, I decided to see if I could use my Dremel tool with this bit to even everything off. Wow! What a great purchase. After juxtaposing the hand filing with the use of the bit, separated by less than 24 hrs, I'll never forget I have it when it can be useful and I know I'm going to be glad I do. This is a piece that is overkill for us mere mortals. It's meant for CNC gods.

Works good on my 1923 endmill

I used these bits in a Foredom jewelry engraving tool along with some StayMax Metal hollow number guided to engrave numbers in my beer flights project. Then I mixed powdered turquois in resin to make these numbered holes.

Used it to cut a 1/2" keyway into a shaft 7" long. worked with great satisfaction

Milling