Hold down is across the battery. Precision CNC machined for fit and has drain holes to prevent build up of moisture. Choose plain, balck or polished. Speedway Deluxe Black Billet Aluminum 3-Bolt Optima Battery Mount. This deluxe billet aluminum battery mount is just what you need for Optima batteries. Fits 91066411 and 91066412 Optima batteries. By Gerald on June 02, 2022. Product was exactly what I was looking for. Really high quality polished top to bottom. By Casper on April 14, 2021. Yes, I recommend this product. By None on March 03, 2020. Looks great mounted in trunk a long with my polished fuel cell. By Niko on June 25, 2019. Great product and polished finished!! By Slick on January 14, 2019. Get them out really easy in the trunk of my 95 mustang street car Mount easy in the back of the truck. Related Items / Suggested Parts. Battery Post and Terminal Protector Kit. 2-Gauge Battery Relocation Cable Kit, Copper, 18 Ft. Two-Post Battery Master Disconnect Isolation Safety Kill Switch. Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years.