dia: 4.00mm(m6), hss m42 tialn coated p/s m/c chucking reamer tolerance m6 as per is: 5446 dia: 4.10mm(m6), hss m42 tialn coated p/s m/c chucking reamer tolerance m6 as per is: 5446 dia: 6.00mm(m6)