<p>Made of high-quality S2 steel, with sturdy hardened & tempered construction, Perfectly matched to most standard tamper-resistant German-made star 6-point screws.</p> <p>This set includes 13pc 1/4-inch shank tamper resistant star bits and 1 standard T-5 star bit & AP Connector</p> <p>Tamper Resistant sizes are: T-6, T-7, T-8, T-9, T-10, T-15, T-20, T-25, T-27, T-30, T-35, T-40, with Storage Sleeve Orange Case</p> <p>Used in automobiles, repairs, trucks, automobiles, engines, motorcycles, interiors, dashboards, computers, cable boxes, toys, appliances and consumer electronics, drill bits can also be used in many other protected parts.</p> <p>Designed to prevent Cam-Out the 6-Lobe 1/4" shank hex bits clicks onto most standard sockets, screwdrivers, drill/driver kits & Power tools attachments. The hole in the center in each bit causes it to be tamper resistance</p>