Description:

Size: R8 to B18 Drill Chuck, 7/16-20UNF Thread. Material: Made of 45# Steel, good cutting performance, high hardness after quenching. Structure: The long end is the R8 shank, the short end is B18. Application: Use with drill chuck, fit for 1mm-16mm clamping range collets. Package Content: 1 x Drill Chuck Adapter.