Strokemakers by Speedshop Int’l., Inc. Strokemakers by Speedshop Int #39;l., Inc. were designed to improve stroke technique, build swimming specific muscles and reduce stress on the shoulders. Available in 7 sizes and suitable for training and drills in all competitive strokes as well as for swim-run competitions, physical therapy, synchro sculling drills, body surfing, and water aerobics. MADE IN USA Strokemakers will improve your swimming by: Increasing distance per stroke by preventing early recovery Improving feel for the water (flow through design prevents #34;dead hand #34; feel) Exaggerating both correct and incorrect hand motions, helping swimmers and coaches identify and correct stroke faults Strengthening the swimming specific muscles while reducing street on the shoulders