The Yakima Outdoorsman 300 truck racks are versatile, no-drill, multi-sport base rack systems for your full size or compact truck. It puts the cargo load up top so you can fill your truck bed with all the rest of your stuff. Clamps onto truck bed rails, no drilling. Heavy duty construction handles loads up to 300 lbs. Fits wide range of truck beds- available in full-size and compact configurations (see yakima-8001136 for compact truck beds version). The Yakima Outdoorsman instantly creates a multi-purpose base rack system that allows all Yakima attachments (boat, bike, ski, basket, or box) to connect to the Yakima crossbars (not included; sold separately to allow the customer to select the right length bar for their truck - see accessories below). Quickly adjusts forward and backward to ensure a perfect fit to all Yakima gear carriers. NOTE: Sold in pairs (i.e. 2 upright towers). To make a complete set for the front and rear of your truck bed, you'll need 2 pairs. Also requires 2 Yakima crossbars (not included; sold separately to allow the customer to select the right length bar for their truck - see accessories below). Easy-to follow instructions included.