"TUFF-tiller" (2) outboard tiller extensions have a linkage mechanism thru the tiller shaft that physically depresses the "kill" button on the end of the tillers' twist grip handle, which is a common feature on most tiller operated outboard engines. Tuff-tiller outboard tiller extensions feature a custom molded boot to fit your tillers' twist grip profile / custom length / all stainless steel clamps / durable vinyl grip / guaranteed strong / product of www--anytide --com /// THIS IS A CUSTOM MADE PRODUCT/ MEASUREMENTS REQUIRED TO BUILD >> shallowwatersolutions.com/tuff-tiller/how_to_order IF YOU CANNOT SUPPLY THESE MEASUREMENTS - DO NOT PURCHASE THIS ITEM LOWER 48 FREE U.S. shipping only