.0540" HIGH SPEED STEEL CHUCKING REAMER 2-1/2" Overall Length 1/2" Flute Length Made in USA Diameter Tolerance on Standard and Decimal Reamers: up to 1/2" +.0002" - .0000" above 1/2" to 5/8" +.0003" - .0000" above 5/8" to 1" +.0001" - .0005" Diameter Tolerance on Dowel Pin Reamers: -.0002" + .0000"