With Spax partial-thread screws, you join timber components, battens, and furniture parts securely with maximum clamping force. The partial thread pulls the top board tightly against the substructure, creating gap-free joints every time. Thanks to the t-star plus T20 drive recess, your bit fits securely to prevent cam-out and slippage, giving you total control and efficient driving. The countersunk multi head finishes flush with the timber surface without the need for pre-drilling in softwoods. Finished with a Wirox coating, the steel screw delivers dependable corrosion protection for indoor installations and sheltered outdoor areas.