TSD1/8S Features: -Shank drill bit. -Made in the USA. -Dec. equivalent: .1250. -Metric equivalent: 3.17mm. Unit Material: -Cobalt/Steel. Use Material: -Metal. Product Type: -Split Point Drill Bit. Use: -Drill Bits. Generic Dimensions: -Overall length: 1. -Product weight: 1lbs. Dimensions: Overall Product Weight: -1 Pounds.