I have a Precision (cleaver)12+x16 for 1 1/8" shaft. This was used on a BGH open boat and hooks hard. Would be ideal with a 1500+hp blown alcohol deal with a 2 speed. This prop will ET like a Mutha! I also have a Menkens (round ear) 11 1/2 x 16 1/2 for 1 1/8" shaft. Has less tail lift than the cleaver, but still a great prop. I need $400.00 for the Precision and $300.00 for the Menkens. Plus the trip.