Throttle Rocker Assist Wrist Rest Control Large With a Throttle Rocker the grip won't have a tendency to slip because your fingers are getting tired, so you won't have to constantly reposition your hand to maintain speed. It's easier to operate the throttle, especially while wearing heavy gloves, and greatly reduces hand fatigue and cramping. You can operate the throttle with a relaxed hand. It comfortably fits the heel and palm of your hand. It is not a throttle lock. To US contential, we ship by USPS first class (about 2 weeks delivery). Shipping to most other regions/ countries takes 2-4 weeks. Feel free to ask if you have any question.