25 pc Triangular Slotted Y shape #1 2 Inch (50 mm) Screwdriver Insert Bits Compatible for Tri-Wing Screw Made of S2 steel for maximum durability. Bits are impact ready. Suitable for both hand tool and electric tool Bits come in heavy duty storage container. | Bits are 2 inches long. US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.