Drill Bushing Bushing Type L Headless Liner Thin Wall Inside Dia 5/8 In Outside Dia 7/8 In Inside Dia Tolerance +0.0002 - +0.0005 In Outside Dia Tolerance +0.0018 - +0.0015 In Concentricity Tolerance .0005 In T.I.R. Max Overall Length 1-1/4 In Material 52100 Thru Hardened Finish STEEL Drill Size 5/8 In Hardness RC 62-64