Feeature: Durable high speed steel Straight flute Straight shank Package Included: 1 x H4 15/32 - 17/32" 1 x H5 17/32 - 19/32" 1 x H6 19/32 - 21/32" 1 x H7 21/32- 23/32" 1 x H8 23/32 - 25/32" 1 x H9 25/32 - 27/32" 1 x H10 27/32 - 15/16" 1 x H11 15/16 - 1-3/16" 1 x H13 1-3/16