Wrist Snapper Ernie Parker's Shorty The Wrist Snapper Shorty is the compact version of the popular Wrist Snapper training device, which is the tool of choice by many of the best pitching instructors. The Wrist Snapper is designed to help strengthen the wrist and forearm while at the same time providing audible feedback for a proper wrist snap, the key element for ball movement and speed. Join the thousands of users who have found the Wrist Snapper to be the most important piece of equipment in their bag to ensure peak performance.