The MID49 1/4″-20 Striped Rosette Screw to 15mm Rod Clamp Adapter easily attaches to the striped rosette on your Canon C80, C400, C300 Mark III, or C500 Mark II, converting it into a 15mm rod port. The adapter’s cross-cut teeth enable the single 15mm rod clamp to be positioned horizontally across the body, allowing for the attachment of additional lens accessories.