High Precision of Internal Hole Diameter. Low Abrasion of Holded Tools. Including: Straight Shank Drill Chuck, Straight Shank Collet Holder, Indexable U-Drill, Boring Bar, Internal Threading Bar, ect. Made from 42CrMo Steel Nitride Surface.
Size:20-20,20-25,25-20,25-25,25-32,25-40. Suitable for All Kinds of Straight Shank Tools. Also, the each additional item means. The the same color and size.
Transit time may be a little delayed because of the. If you have any questions.