forcing the wood apart. Screw threads are another simple machine, and can be thought of as a long, gently sloped inclined plane wrapped around a cylinder. Cut a long right triangle out of paper ...

They demonstrated that the machine was viable using nothing but wood for construction ... enough times to create a very nice-looking screw thread. And once you’ve made two identical threaded ...

Designed for superior performance, efficiency, and reliability, this new generation of Power Pro Premium Wood Screws is engineered to redefine fastening in wood construction projects.