New mint condition. Chadwick & Trefethen 21510 Size : A 15/32″-17/32″ Critchley HSS Straight Blade Reamer Made in USA Similar to Critchley Angle Blade Reamers, these reamers are manufactured with straight high speed steel blades that will hold their edge much longer than carbon steel. High Speed Reamers can be used with C&T Pilots to insure superior results and perfect alignment.