Some of the toughest mounts money can buy - the BalZout Electronics Mounts are 100% made in the USA. The sturdy, connecting arms are made from cnc-machined, anodized, aircraft-grade aluminum, and the balls that make the mounts work, as well as, the threaded studs are made from stainless steel. The holes in the knobs also allow you to use the end of whatever is handy to lock them down. That means you don't have to stop half way to your next hot spot and reposition your graph to keep it from beating a hole in your deck or knocking the gel coat off the counsel. Rest assured the BalZout Electronics Mounts are strong enough to stand up to the abuse. 100% made in the USA Extremely Tough Anodized aluminum finish CNC-machined parts Aircraft-grade Aluminum Fits all Garmin , Humminbird and Lowrance HDS-7-HDS10 Units Faceplate 6-7/8" x 1-34, Height 7", Base 3-3/4" Diameter