Dowel screws, often called wood-screw threaded studs, lack heads in favor of lag threads on Each individual close that descend to your blunt Middle. These screws are supposed to be used in pre-drilled pilot holes; even so, their threads permit them to be pushed into lumber with no prior drilling. https://stephenypguj.fireblogz.com/60680680/detailed-notes-on-lead-screw-examples