Framing tool with automatic fastener-size adjustment

摘要

A tool has an improved nosepiece and shear block assembly that drives a fastener supplied from a plurality of fasteners. The assembly includes a nosepiece that is configured for attachment to the tool and defines a portion of a barrel and a shear block configured to be secured to the nosepiece to complete the barrel. There is an opening in barrel has for receiving a fastener. The assembly also includes a biased fastener-size adjustment device, which exerts a biasing force against fasteners adjacent the opening.