The YakAttack GTTL175 Generation II Top-Loading GearTrac is the future of YakAttack's already diverse GearTrac product series. This is the top-loading version of the already popular GT175 series, which gives you the ability to just attach mounts from the top instead of sliding at the ends of the channel! In addition to ease of accessory attachment, the GTTL175 series is installed topside surface, there is no need for backside access. Aluminum Designed for harsh marine environments Superior surface-mount stability Includes #10 blunt tip stainless steel thread-forming screws Hole pattern 1 5/16 in. wide by 1 3/4 in. long Compatible with 1/2 in. wide track hardware Made in the USA