Outboard Tiller extensionWith a simple push over fitting it clamps on to the twist grip throttle. There is a hole in the shaft to allow you to still press the stop switch if it is located on the end of the tiller arm and it can be extended or contracted to suit your boat This unit will work with twist grip handles on the motor of 35 45 mm diameter Telescopic Outboard tiller arm extension , Length of tiller extension 600mm to 1000mm Fixed Outboard tiller arm extension, Length