HHIP-37010139-Pro-R8-To-JT4-Drill-Chuck-Arbo
Made of 20CrMnTi alloy steel Electrolysis nickel coating Premium hardened & all Ground body for extended tool life. Thread of Drawbar end: R8- 7/16" -20 Maximum RPM is 8,000 T.I.R. is lesser than/equal to 0.0002" Superior finish.