The pinnacle of your screw would be the area where by it will cease outside the house the floor of one's project/materials. Each read more individual screw head serves another intent and is also created to be useful for sure apps or components. You may use a Robertson’s bit to travel it or make use

The polydrive screw drive, also known as RIBE,[seventy four] is spline-formed with rounded finishes during the fastener head. The Software has 6 flat enamel at equivalent spacing; the dimensions are determined by the diameter of the star points. this type is often present in roofing bolts together