Brand Yato Symbol YT-17683 Thread size M10x1.25 mm Tapper material HSS 4341 Drill material HSS 4241 Spiral insert material stainless steel Number of pieces in the set 30 Set contents single-step tap to make a thread for a new insert, spiral insert x25 (M10x1.25), knob for screwing in spiral inserts, punch, drill to ream out damaged thread, Set contents cont. hexagonal key Designed for replacing broken threads with new ones. The set elements are made of durable stainless steel. Contents of the set (30 elements): single-step tap for making a thread for a new HSS insert spiral insert x 25 (M10x1.25) knob for screwing in spiral inserts, punch drill for drilling out damaged HSS thread hexagonal key Size: M10 x 1.25 mm