The BT50 Tool Holder accepts all ER25 collets
ER25 Collets range from 1 mm to 16 mmThread inside the internal stop screwMade from alloy steel hardened to 54 56rcBalanced to G6.3 at 12,000 rpmsConcentricity is less than .005 micron up to 100 Length and 0.012 up to 200 LengthAll critical tool holder surfaces precision groundCoolant through capabilityGage length is 70mm,100MM,150MM,200MMRear thread for pull stud is M16 X 2.0
All holders can become through coolant by simply removing the screw in the center by allen key
