Fast Prop Service: Allows quick and easy removal or replacement of propeller for maintenance, upgrades, or damage repair Complete Hardware Included: Includes prop nut and washers for complete installation with all necessary fastening components "D" Shaft Compatibility: Compatible with 4-inch diameter 36-volt trolling motors with "D" shaped prop shafts for proper fit Marine-Grade Stainless Steel: Made with stainless steel components that resist corrosion in harsh marine fishing conditions Secure Attachment: Ensures propeller is securely attached for reliable on-water performance and safe motor operation