VOLKEL - M3 x 0.5mm - White Spiral Flute 39° TwinBox 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. Within this set you will receive a machine tap and a twist drill. 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: Stainless steel, long-chipping up to 1000N\/mm ² Steel, heat resistant, long chipping Titanium, long-chipping 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 - M3 x 0.5mm - White Spiral Flute 39° TwinBox