Professional tool for commercial or occasional use. Precision machined alloy steel taps and dies. Dies are split to help facilitate the fine adjustment of core diameter. Set includes metric coarse and fine sizes. Set includes 2 x of different taps (1 x taper for starting the cut of the thread and 1 x intermediate tap / second tap for the next stage) Manufactured from high quality steel, heat treated and tempered for strength and durability. Supplied in a blow molded case for easy storage and transportation. Trays are fully removable so when you open the case the tap and dies don't fall out. Trays are plastic molded for easier organisation. Set Includes: 2 tap holders M3 M12 (1/16" 1/2") and M6 M20 (1/4" 3/4") 1 T bar tap wrench. Die holder total length 200mm (1" diameter bore) Die holder total length 270mm (1 1/2" diameter bore) Thread Sizes Included in Set M2 x 0.4, M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 0.75, M6 x 1, M7 x 0.75, M7 x 1, M8 x 0.75, M8 x 1, M8 x 1.25, M9 x 0.75, M9 x 1, M9 x 1.25, M10 x 0.75, M10 x 1, M10 x 1.25, M10 x 1.5, M11 x 0.75, M11 x 1, M11 x 1.25, M11 x 1.5, M12 x 0.75, M12 x 1, M12 x 1.25, M12 x 1.5, M12 x 1.75, M14 x 1, M14 x 1.25, M14 x 1.5, M14 x 2, M16 x 1, M16 x 1.5, M16 x 2, M18 x 1.5