·Tools for installing screws The screwdriver is a tool for loading and unloading. The shape matches the groove shape of the screw head, and there are two types: one-word and cross-shaped. More convenient and labor-saving.
·DIN 571 hex head lag screw bolts are heavy duty wood screws usually used to attach lumber to lumber or lumber toto masonry. Commonly used in deck and dock construction. Pre-drilling is recommended to prevent splitting. They aregenerally much larger in size than standard screws.