Getaprop mcgard http://www.getaprop.com/ Sat, 4 Feb 2012 14:04:47 -0600 en 74039 Thread 3/4-16...Fits Mercury/Mariner 70 HP and larger (2 stroke) Mercury 50 HP and larger (4 stroke) (ex. 225 HP 4 stroke before 2005) Johnson/Evinrude 150 HP and larger (2 stroke) Theft Protection During Use, Storage and Transit. Protect yourself against expensive propeller theft with a McGard propeller lock, featuring the same patented design as our stern drive and outboard motor locks. A free-spinning collar will turn if attacked by gripping tools without loosening the lock. Constructed of naval brass and hardened stainless steel, once installed our propeller lock offers maximum security for 24 hour protection. http://www.getaprop.com/content-product_info/product_id-2844/outboard_propeller_lock_74039.html http://www.getaprop.com/images/products/Propeller02[1].jpg http://www.getaprop.com/content-product_info/product_id-2844/outboard_propeller_lock_74039.html