VOLKEL - M10 x 1.5mm - Green Spiral Flute 39° Taps are used to produce a thread near the bottom of a blind hole and therefore have a very short lead. Spiral flute taps work better on materials which form long, stringy swarf as opposed to chips as the right hand spiral cut of the spiral flute forces the the swarf away from the cutting teeth and out of the hole. These taps have been manufactured by VÖLKEL, with 100 years of experience in manufacturing screw taps, VÖLKEL has become one of the worldwide leading suppliers for threading tools.  Recommended Materials Steel, unalloyed and low alloyed, short-chipping non abrasive material up to 1000N\/mm ² non abrasive material, short-chipping Iron, malleable cast Brass, long chipping Bronze, long chipping Copper Aluminium-alloys, long-chipping Zinc alloys Magnesium Alloys Plastics, thermoplastics This is not a stock item therefore please allow 1-3 working days for dispatch. As this is not kept as a stock item, this is non-returnable & non-refundable. VOLKEL - M10 x 1.5mm - Green Spiral Flute 39° Taps