LITTLE KNOWN FACTS ABOUT TYPES OF SCREW HEADS.

flat head screwhex head screwlag screwsPhillips screw headRobertson screw headself-tapping screwsTorx screw head if you would like make use of your screwdriver for prolonged intervals with out worrying about running outside of battery, corded screwdrivers are the greater choice. This type of screw head seems like the Phillips, except that it's go

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