The taper tap has a gradual cutting action, due to the pronounced chamfer of the thread, making it suitable for starting a thread. JEU DE 2 TARAUDS DE M14 X 1.25 Mm - SARLAT OUTILLAGE Used with Connect adjustable tap holder, Part Nos. Tarauds M7 x 1.00, jeux de 2 (ébaucheur et finisseur) - Action karting... Manufactured from alloy steel. Idéal dans le secteur industriel. KS TOOLS Ébaucheur M8x1,25, pour 331.2080 | Leroy Merlin 37021 (M3-M12) or 37022 (M6-M20). The plug tap has far less of a chamfer and is used after the taper tap to get close to get to the bottom of the hole., Taraud métrique