Made from high-quality wooden plyo boards for increased longevity. Two surfaces with holes created on it for easy portability. There are internal bracing locks at the box’s eages for solid construction. Comes with rounded corners which will help in jumping with full force. BUILT TO LAST: Made of high-quality plywood with puzzle joints, Non-slip Wooden Plyo Box is durable and can hold up to 450lbs. 3 IN 1: Uniquely designed with 3 different heights (16x14x12”- (LxWxH)), the plyometric box allows you to control the level of difficulty in the jump box exercise. Develop strength with our plyometric box at home or the garage gym through squat, step up, dip, box jump training & more.PRO-DUTY WOOD CONSTRUCTION: Goes with internal bracing (on 3 largest sizes) for maximum strength for a non-slip surface on the top and to support heavy-weight athletes, HIIT, MMA. EASY ASSEMBLY: Pre-drilled holes make the jumping box easy and quick to assemble. SAFE AND CONVENIENT: Our workout box have sanded corners and edges plus textured exterior sheathing, so you can rest assured that they are highly slip-resistant and extremely safe to practice with. Designed to Keep Up with Progress. Our anti-slip workout box jumps for gym or home are adjustable to the height you need as you increase your CrossFit or MMA training intensity. Train as hard & as many reps as you can with our 3 in 1 wood jumping box.