TTC P Style Precision Drill Jig Bushing - Inside Dia: .0625" Inside Dia x Length: 1/16" x 1/2" Outside Dia: 3/16" Tolerance- Inside Dia: +.0001" / +.0004" Bushing Concentricity: "0" to .0005" Hardness: Rockwell C 61 - 65 in the hole Review