Bound 3-in-1 Wood Plyo Box - (30/24/20 - 24/20/16 - 20/18/16 - 16/14/12) - CrossFit Training, MMA, or Plyometric Agility - Jump Box, Plyobox, Plyo Box, Plyometric Box, Plyometrics Box Perfect for box jumps, step-ups, box squats, and CrossFit workouts Plywood - 3/4 inch thick. Assembly screws and square-drive bit are included. Flatpacked requires assembly. Basic DIY skills required. Tight Fitting design requires Rubber Mallet for assembly. This makes box extremely strong even without screws or glue. Pre-drilled holes makes it quick to assemble. 10-15 minute assembly time with a power screwdriver.