Self-tapping Screw: Uniqueness And Innovation
* They have thread cutting functions that make them usable and friendly on metal and wood surfaces
* They have thread forming functions that makes them adaptable to be used on plastics for strength and tightness of fixing, check www.tappex.co.uk
* Comes in any form with blunt, flat or sharp piercing tip
* No head pops up and the screw drives itself inside completely.