Tungsten Carbide Deck Bit | BordoBORDO DECK BITS are fully adjustable to suit your specific fastener, timber species or custom application. Additionally Deck Bits feature: Pilot hole to suit 10G or 14G screws. Prevent decking timber splitting. Adjustable, free spinning, non marking collar. Wide gullets prevent the jamming and clogging of wood chips. Large gullets also provide an unobscured view of the operation. Replaceable HSS pilot drill. Heavy duty hex shank ensures maximum torque