Excellent for developing speed, backward facing drags work your entire posterior chain, and are a great way to strengthen your quadriceps. Strengthening your hamstrings and other muscles is another benefit of pushing the sled with the handles. Suitable for Olympic or Standard plates comes with a luxuriously padded vest and extremely sturdy straps. Suitable for carpet or grass Brand name Strength Sled with a Harness Model Type: Classic Style; Alloy Steel; Maximum Weight Suggested 150 lbs.