ProSource Plyometric Boxes are a must-have for any CrossFit box, home gym, or athletic facility for their versatility and performance enhancement. Plyometric jumping boxes are a simple, yet effective way to improve overall fitness as well as athletic ability. The 3-in-1 design allows you to adjust the height for multiple users or exercises without the need for so many space-wasting platforms. Just turn it on its side to make your workout harder or easier. With two sizes available (24”L x 20” H x 16”W and 30”L x 24” H x 20”W), you can get up to 30-inches in height, or as low as 16-inches, perfect for any fitness level. These durable plywood boxes are built to withstand heavy use with tight-fitting, interlocking pieces for stability. They include an internal brace for extra strength and reinforcement. All screws are included and each piece comes with pre-drilled holes for easy assembly. All edges are sanded and rounded for extra safety, and two side cut-outs carrying handles make it easy to move boxes around the gym. Boxes are ideal for CrossFit WODS and performing box jumps, burpee box jump overs, and stretching. Also a great addition to any fitness routine to work on lower body strength, explosive power, and high intensity interval training. Use for plyometric exercises like step-ups and lateral hops, or general strengthening like squats, push-ups, triceps dips and more.