This is the Riffe Reel Converter Kit Base for Spearfishing Spearguns Features: Flat Mount comes with (x2) 10-24 3/4 Stainless Steel Head Hex Bolts for mounting on RIFFE Euro Series and other RIFFE models using thread inserts or may be mounted with wood screws placed in a pre-drilled hole. Radial Mount comes with (x2) #10 1 1/4" Hex Head Screws for mounting directly into wood stock. Convert a Horizontal Reel (Original or Low-Pro) from a radial mount to a flat mount or from a flat mount to a radial mount by replacing the base. "