Parallel Shank Twist Drill Bit Set, One Piece Constructionparallel Shank Twist Drill Bit Set, One Piece Construction,Parallel Shank Twist Drill Bit Set, One Piece Construction. Hss Drill Bit Set For Metal Drilling App Lication. Size 1 Mm To 10 Mm. Material- High Speed Steel. Confirming To Is 5103. [ Warranty Period: 30 M Onths After The Date Of Delivery ] ]