Scotty 1021 Portable Bracket f/#1050 & #1060 Scotty Downriggers 
Portable mounting option that's great for aluminum boats. Double stainless steel bolts and black anodized aluminum. 2" clamp opening. Includes stainless steel bolts to fasten mounting bracket.
Dimensions: 5 5/8" x 4 3/4" x 3 1/8"
WARNING: This product can expose you to chemicals including NICKEL (METALLIC) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.