7 x 30mm Draper TX - STAR® bits: T20 T25 T30 T40 T45 T50 T55. 7 x 75mm Draper TX - STAR® bits: T20 T25 T30 T40 T45 T50 T55. 5 x 30mm spline bits: 5 6 8 10 12mm. 5 x 75mm spline bits: 5 6 8 10 12mm. Expert Quality insert bits manufactured from S2 silicon steel hardened and tempered with shot blasted finish.