Spiral Quality Tap Set For Stainless Steel A spiral quality tap drill bit set is a type of cutting tool used to create threads in metal or other materials. The M3 and M4 refer to the size of the tap drill bit, with M3 having a diameter of 3 millimeters and M4 having a diameter of 4 millimeters. Spiral tap drill bits are designed with spiral flutes that allow chips and debris to be removed from the hole as it is being drilled. This type of drill bit is commonly used in machine shops, metalworking, and other industries where precision threading is required. Product Features To use an M3 or M4 spiral thread tap drill bit, the material to be threaded is first drilled to the appropriate size. Then, the tap drill bit is inserted into the hole and turned clockwise with a tap wrench or similar tool. As the cobalt tap set cuts into the material, it creates threads that match the size and pitch of the tap and die set. Spec…