Manta Ray Squat Pad and Power Lifting Straps, Combination Pack Manta Ray lets you focus on squat technique rather that discomfort, numbness or shearing muscle trauma. Manta Ray weight distribution principle takes the bar off your deltoids and vertebrae, transfers weight across your trapezius muscles and reduces risk of injury. Manta Ray will fit on 1" and 2" bars. Lifting straps' anti-function rubber generates more friction between the strap and the skin, decreasing slippage and safely stabilizes the connection to the bar. Lifting straps made of specially woven synthetic fabrics for excellent durability against heavy weigh training