NO ASSEMBLY REQUIRED: Arrives fully assembled, 24" Plyo Box measures 15x15" top platform and 21x21" base INDESTRUCTIBLE DESIGN: Heavy-duty steel construction, durable non-slip vinyl landing surface, and non-slip rubber pads on all 4 corners guarantees safe and dynamic workouts for years to come OPTIMUM SAFETY: This adjustable plyo box is excellent for both men and women with a slip-free landing pad, fully wrapped with tucked corners, guaranteed not curl up after many uses IMPROVE BODY TONE: Excellent for plyometric and speed drills, improve shoulders, arms, chest, glutes and legs while strengthening and improving overall core stability POWER UP YOUR WORKOUT: Develop that explosiveness you have wanted and build proficiency with every box jump, agility, and stamina workout