Micro 100 THMA-412 Boring & Grooving Bar Holders; Inside Diameter (Inch): 1/8 ; Inside Diameter (Decimal Inch): 0.1250 ; Outside Diameter (mm): 12.0000 ; Overall Length (mm): 69.8500 ; Overall Length (Decimal Inch): 2.7500 ; Overall Length (Inch): 2-