What is a Cotter Pin? | What are the uses of Cotter Pins? | Mechanical Boost

Here’s @skylar.wallace loading 425lbs on her back for split-pin squats… then heading straight into explosive split jumps. Coach @cjcarney_ is training her like an Olympic sprinter this offseason — and she’s becoming more dynamic, more powerful, and faster than ever. Softball girls… the best in the world LIVE in the weight room. Comment STRONG below and I’ll send you a FREE 1-week trial to the exact program Skylar uses. | Summers Method