Matrix Magnum Olympic Flat BenchMatrix Magnum Olympic Flat Bench MG A78 The Magnum Olympic Flat Bench is designed to support a wide variety of strength training exercises. Pivoting knee rests comfortably accommodate users of all sizes, and a wide back pad stabilizes users during heavy lifts. Molded urethane guards protect Olympic bars from damage, reduce noise and provide a hand rest for spotters. The frame features a proprietary two coat powder finish for long lasting durability.