G2931 Drill Bushing Bushing Type Slip Fixed Renewable Combination Thin Wall SF Inside Dia 29/64 Outside Dia 3/4 In Inside Dia Tolerance .0001-+.0005 In Outside Dia Tolerance -0.0002 In Concentricity Tolerance .0005 In T.I.R. Max Overall Length 1-1/4 In Material 52100 Thru Hardened Finish Steel Drill Size 29/64 Hardness RC 62-64