G2827 Drill Bushing Bushing Type Head Press Fit H Inside Dia 1/16 In Outside Dia 3/16 In Inside Dia Tolerance +.0001- +.0004 In Outside Dia Tolerance +0.0016 - +0.0006 In Concentricity Tolerance .0003 In T.I.R. Max Overall Length 1/4 In Material 52100 Thru Hardened Finish STEEL Drill Size 1/16 In Hardness RC 62-64