
I used two sets of cheap torx bits when trying to remove a seat on my truck. The fasteners go through the floor pan so they are exposed to the elements underneath the truck, which has some rusting. I wasn't able to loosen a single screw because the Craftsman and Harbor Freight bits broke as soon as I applied significant torque. These OTC bits had no problem removing rusty screws. Fits very snugly on the clasp and is an extremely durable racquet. I would have no hesitation in using larger bits with an impact driver even if it voids the warranty.