Sheet metal screws secure and tighten metal items to each other, or to fasten items like plastic or wood to metal. These screws have sharp tips and include a fine thread along the shank.

We’ve seen lots of homebrew plastic extruders before, most of which use repurposed auger-type drill bits as compression screws. Those lack the variable geometry of a proper compression screw ...

Unwilling to deal with the accumulation of chips in the expensive ball screws of his homemade CNC router, [Nikodem Bartnik] took matters into his own hands and created these DIY telescopic ball ...