Hss Taper Shank Twist Drill -30Mm Dia, Materials Grade: M35, With 5% Cobalt (Chemical Composition) Grade: Xt90W6Com05Cr4V2 As Per Is:7291-1981, Make: Miranda/Addision/ It/ Yg-1 Or Simil Ar Brand. [ Warranty Period: 30 Months After The Date Of Delivery ] ]