By ACME Marine for 1 and 1-1/8" Shafts.

3/4" -10 UNC

Awesome device that works by simply removing your prop nut, screw the harmonic puller onto the shaft and gently tap with a hammer. Bingo; prop comes off!

NOTE: You do NOT have to screw it on far enough to reach the prop hub! May have to wiggle the prop as you are tapping on the harmonic puller.