Wilderness Systems Helix Pedal Drive- Replacement Thumb Screws Pair

1/4-20 is a thread specification for imperial screws and bolts and refers to the 1/4 inch diameter with 20 threads per inch spacing. Wilderness Systems Helix Pedal Drive is a pedal powered propellor drive system with forward and reverse. Featuring a 6:1 gear ratio precision-tuned to a 14 x 17 two- bladed fixed pitch prop, the Helix PD is the most efficient and intuitive pedal system ever engineered. Fully deployed, the system is optimized for maximum speed in exchange for less effort so you can be hands-free to fish all day. A ground breaking auto-raising mast achieves zero draft with a spring-loaded kick pedal, and the unit can be further stowed forward and out of the way to complete the 3-phases of possible positioning. Helix Pedal Drive is found on Wilderness Systems Kayaks including the Recon, RADAR 115 &  125 MPN 9800893 UPC 729282089304