Set of taps - 21 parts, set taps, quality steel, precise processing, for cutting internal threads, for pre-drilling we recommend using professional drills FESTA 4241 (19693….), W 9 (19550….) Or Cobalt C5 (22530 .... ), dimensions: M 3, 4, 5, 6, 8, 10, 12, packaging - stored in a practical and durable metal box. [***]