THE LYNDEX B5007-0040-4.00 IS A BT 50 HIGH TORQUE COLLET CHUCK SET, INCLUDING THREE UNITS. EACH CHUCK FEATURES AN ER40 COLLET SYSTEM AND A BT TAPER SHANK TYPE WITH A BT50 TAPER SIZE AND MODULAR CONNECTION SIZE. TECHNICAL SPECIFICATIONS INCLUDE A NOSE DIAMETER OF 2.5 INCHES, A HEAD LENGTH/PROJECTION OF 4 INCHES, AND AN OVERALL LENGTH (OAL) OF 8 INCHES. THE CHUCKS ARE DESIGNED WITH THROUGH COOLANT CAPABILITY.