Presto M4 X 0.7 tap set and 1 x Presto 3.3mm HSS tapping drill.
Quality High Speed Steel as you would expect from Presto Tools
Used for cutting internal threads.
Straight Flute full size taps used as machine taps or hand taps for free cutting steel up to 800N/mm2.
The perfect form thread is generated by a combination of effective pitch diameter, major diameter and chamfer length.











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