Different color-coded push-up board targets specific muscles worked (Blue-chest, Red-shoulders, Yellow-back, and Green-triceps). Heavy duty "Plug & Press" push-up board system with multiple positions and angles that sculpt and maximize upper body definition Burn calories and build strength with this innovative push-up system, leading you through a total-body strength and conditioning workout. Portable, Simple Assembly and Storage Cushioned, Non-slip. Hand Grips. Non-slip Hand Grips, Portable, Simple Assembly and Storage. Premium ABS tough plastic, which is very tough and not easily broken or damaged. Hand Grips are anti-slip. Portable, simple assembly, and storage. It is convenient for training use.