Screw extractors kit for M3-M4-M5-M6 screws

The tool body is made of tool steel of the highest quality and subjected to various heat treatments to reach a hardness of 64 Rockwell. In this way the tool has the ability to pierce screws with quality 8.8 or stainless steel. The unique feature is the left hand cutting edge. The reversible power drill must in fact be operated for the entire operation in a anti-clockwise direction. In this way, very often, the screw is loosened and removed even during drilling. The self-centering drill point is specifically designed for drilling rough surfaces. The drilling depth needed for the extraction is very low, this means a drilling time shorter and less odds that the operator drills offset and going to damage the thread. The release ring is made of seven helical grooves. These optimally distribute the tensions in the hole without causing the expansion of the broken screw, main reason of failures that occur using standard extractors.