Description of Chicago Latrobe High Speed Uncoated Conventional Cutting Tools
Set of 20 jobber length drill bits includes one each of wire gauge sizes #80 through #61. High-speed steel (HSS) provides hardness for wear resistance. Uncoated (bright) finish is an untreated surface that can be used on a range of materials, especially soft metals. 118-degree conventional point for a range of drilling applications. Jobber length drill bit has a midrange drilling depth suitable for general-purpose drilling applications. Made in the USA.
According to my experience, these cutting tools were not up to par for industrial and scientific use. The uncoated finish wore quickly and left jagged edges, causing delays in our project timeline.The only advantage was the affordable cost but ultimately the cons outweighed any savings..
The scale of the picture is very deceptive. The metal body of the bit is less than 1.5 inches wide. These are very small pieces. The sizes seem correct. The bits are a little loose in the holders. One fell out of the package during shipping. Be careful with them as the size can be easily damaged. Keep them sorted carefully or you'll have to use a micrometer to put them in order. These bits are designed for use with very small vices.