Made for use with your SUP or kayak, the YakAttack(R) GearTrac Mount provides a four-inch length and easy to install design. This mount boasts a high-performance, marine-grade polymer construction that's built to last, and is easy to install with necessary hardware included. FEATURES: For use with kayaks or stand-up paddle boards High-performance, very durable polymer design Made with UV and marine grade polymer For light to medium "duties" Compatible with ½:" wide track hardware Easy to install Includes all necessary hardware Hole spacing: 1 3/4" Dimensions: 4" L x 0.88" W x 0.38" H