Prop Protector is a simple shaft driven rope and weed cutter which installs easily to your shaft, without having to remove the propeller and with very little maintaince. Prop Protector is a circular, razor sharp knife fixed to the propeller shaft. It revolves with the shaft and instantly cuts any rope or weeds picked up by the propeller. Prop Protectors are available to fit shaft sizes from 3/4 to 4 inch and 20 to 100mm diameter.