"An easy-to-move wheel chock for car trailers or flat beds outfitted with E-Tracks, the Erickson E-Track Wheel Chock helps keep vehicles locked down. This durable steel chock features a durable power-coat finish and an easy-to-operate lock mechanism for fast moving when needed. Designed to work with any vertical E-track (not included) and DOT-approved tie-down straps (not included), this chock features a reinforced base support for trustworthy use. Works great with race cars, hot rods, classic cars, ATVs, UTVs, and trucks. 8.75""L x 6.5""W x 4""H. Manufacturer model #: 09162. Easy-to-use wheel chock for E-Track-outfitted trailers Steel construction with a durable power-coat finish Easy-to-operate lock mechanism - anchors securely, moves easily Works with any vertical E-track (not included) Reinforced base support - sure anchor"