The Pro Sled Core Unit is a versatile push, pull, or drag structure that focuses on speed training and agility on different terrain and hard surfaces. Perform multiple exercises with the addition of 2" side hole spacing on the skids, allowing you to add a variety of mountable accessories, including High/Low Bar, Lawn Boy, and Wrap-Around Rail. This durable, heavy-duty Sled is the perfect multi-function system that will improve your strength training foundation.