For use in high-speed air driven turbo handpieces with a range up to 80 000 RPM. The quality is excellent with diamond particles electroplated onto surgical-grade stainless steel. Shanks are 1.6mm -1/16- in diameter with an average length of 20mm -¾-. Great for use in high-speed air driven turbo hand pieces when carving stone, ceramics and more Made of surgical grade stainless steel with electroplated diamond particles Packaged of 1 Individual Bit Coarse (80) grit 1.6mm (1/16”) in diameter; 20mm (¾”) long SKU: DIB-723-02-1 UPC: 196943112808 BRAND: Micro-Tools MPN: DIB-723-02-1 Made In: Taiwan Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.N093A