The YakAttack FullBack GT175 GearTrac Backing Plate helps fortify the already durable GT175 series tracks. This plate can be attached on the backside of the GT175 track for increased stability and rigidity. The FullBack provides significantly more surface area contact than nuts and washers. Width: 4 in. Four #10-32 stainless steel screws included Quantity per pack: 1 Made in the USA