The Technician Set is the perfect solution for every technician. Have confidence in your tools and Be in Control . This includes a sturdy clamshell that can be used to store and protect the screw starters. Operation: Simply insert the metal tips into the screw head and push the handle forward. The screw can then be started or removed and when finished simply press the release rod to reset the holder. View our Demo video on the home page. S6- 6 Holder for use with flat head or combination screws S3- 3 Holder for use with flat head or combination screws P6- 6 holder for phillips head screws and small slotted screws P3- 3 holder for phillips head screws and small slotted screws. For starting or removing. Not for Torquing! Check our website for more options and demonstration videos For use with screws ranging in size from #4 up to 1/4