Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...

Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...

Over the past few weeks we've looked at automatic wire strippers for the perfect wire cut, the ChassisEAR to locate bad noises and the extension wrench that loosens bolts in tight areas. This week's ...