Heavy-duty design for CNC & manual drilling & counterboring operations. High-precision keyless chuck-arbor is integrated for a single-piece construction. The integral shank design is more compact than a combined drill chuck and arbor and eliminates the possibility of a chuck slipping off its arbor. Single-piece construction provides for increased accuracy and greater rigidity. Safer than separate shank models. Titanium jaws hardened to HRC 60. Increased holding power when tightened by wrench, preventing tool slippage. Easy to use. TIR: 0.003". Wrench supplied.