'Drill Bushing, Headless Press Fit, Inside Dia. 1 In., Outside Dia. 1-3/8 In., Inside Dia. Tolerance .0002-+.0006 In., Outside Dia. Tolerance +0.0018 - +0.0022 In., Concentricity Tolerance .0005 In. T.I.R. Max, Overall Length 1 In., Material 52100 Thru Hardened, Finish Steel, Drill Size 1 In., Hardness RC 62-64'