TYPES OF SCREW HEADS THINGS TO KNOW BEFORE YOU BUY

This type of screw is often a non-structural fastener. It is supposed being tightened and loosened by hand using the ridged sides. Some can also be built with a critical-like flat side or fashioned for flat or Phillip head screwdrivers. This little bit of length far from the middle enables you to exert far more power with a lot less exertion, eith