Spurs Line Cutter Model F Fits 2 1/4" Thru 3 1/2" Shafts...
Shaft Diameter:2 1/4" Thru 3 1/2"
Cutter Hub Diameter:5 1/2"
Cutter Width:1 9/16"
Min. Space To Install:1 3/4"
Cutter Overall Diameter:10"
for more info.-> http://www.spursmarine.com/downloads.html