SHIMANO ROD CLAMPS FOR SHIMANO BEAST..ALSO FITS A LOT OF OTHER REELS AND THE OLD P SERIES TIBURON FRAMES. P-40 AND P-60. CLAMP STUD PATTERN FROM CENTER TO CENTER IS 1- 5/8THS. STUDS ARE EXTRA LONG. 1 INCH AND 5/8THS..1/4 X 20...19.95 btrcbeast$19.95