This is sold as a set of two screw bits. They are made out of metal. These are genuine items that are supplied by the original equipment manufacturer for use with screwdrivers made by Senco. When replacing the bits a set of pliers might be required. These parts may become stripped or broken and will need to be replaced.
The roller attaches to the slide body assembly. It is an authentic OEM part for use in fastening systems made by Senco. This item is made of plastic and is sold individually. A screwdriver may be required to replace this part if it becomes broken.