this is the variation in the counter sunk screw head, nevertheless the below surface area of The top is curved, like a bugle. This lowers damage to plasterboard cutting down tearing of your paper, so is typically observed on drywall screws The dearth of centring implies that the screwdriver bit click here can slip (‘cam-out’), particularly whe

Combi screws are just as the title implies: A combination of two screw heads on a single. you will find many different types of combi screws, all of that may be utilised with a number of drivers. The purpose of a combi screw is comfort. Basically, that a single screw can be employed with possibly a Philips read more or even a flathead driver, etc.