• Double-threaded screws designed to join slats or extend wooden pieces without exposing the connecting screws. • Ideal for carpentry work, featuring two threads and no screw head. • The upper part has a metric thread and the lower part a wood thread, with a central hexagonal area that makes tightening or loosening with a wrench easier. • Used for wall or ceiling fastening, joining objects with a nut to wood, masonry, natural stone, or concrete. • Widely used in household and office equipment, communication equipment, ship assembly, building construction, concrete slabs, carpentry, framing, plumbing, interior and exterior conditioning, renovation, and solar installations on rooftops. • Made of galvanized steel, a material coated with layers of zinc that protects against oxidation and corrosion, providing greater durability and resistance. • Installation requires a pre-drilled hole. • The set includes 25 double-threaded screws, suitable for direct fastening in wood or with a plug in other base materials. • Dimensions: screw diameter 10 mm, length 80 mm, Torx drive, partially threaded for better assembly of durable components. • The screws stand out for their reliability, simplicity, and strength.