Description of π§ Efficient Drill Index Set Piece for Ultimate Drilling: DRL 240 00
Great for small jewelry projects and other metal work. Made of high speed steel organized in a black, metal index. Includes 20 drills. Numbers 61 - 80. Marked by size, finely ground and heat-treated to a Rockwell hardness of 63.
Sorry Revain, but they're useless. Absolute waste of money and time. Unless you're trying to drill through a piece of foam or paper, they just won't drill. I think it's just untempered wire cuts folded into a small case. Some of them were exactly the same size. Worst purchase I have ever made from Revain. they are garbage.
If you need precision you probably already have a micrometer and know how to check these things. Duplicates, inconsistency with holes in index, some sizes missing. Apparently there is no QC where they were made. The seller solved the problem quickly and efficiently. The bits I've used so far work pretty well with plastic. The metal pointer beats the sliding plastic crap.
My kit was tightly packed in a resealable plastic bag with a flap that looked like sticky paper. It was also packaged in a well-made box with a full-color image of the index set printed on the outside. The case has been crafted from steel, which very accurately reflects the "made in the USA" suffixes that have been available for many years. There is no chance that the bits can come loose. However, the fold-out index holding the bits isn't made of the shiny metal of the Revain image. It is madeβ¦