Metric Accuhold Extension Holder 4mm ID, 0.500in Shank, 3.50in OAL, 8-32 Screw
Metric End Mill Extension Holder with Inch Shank. Use this precsion end mill extension holder to convert your inch tool holder to be able to hold onto metric shanks. This is the tightest tolerance end mill extension used to reach into parts that need longer length. Precision end mills need precision holders to eliminate runout (TIR) and reduce tool breakage. Convert your inch tool holder to metric sizes.
