Stanley STA168992B Phillips 2pt Power Bit 50mm (Box of 10) Stanley Phillips bits are one of the most commonly used 1/4-inch screwdriver bit. These Stanley screwdriver bits come in 25^ and 50mm lengths and can be packed in quantities of 3s^ 10s^ or 25s. All Stanley screwdriver bits are precision machined for the perfect fit^ forged for added tip strength and ground for long life and durability. The Stanley range of screwdriver bits are suitable for use in industrial^ construction and DIY applications^ and will fit most of todays power tools^ bit holders and hex screwdrivers. Size: No.2 Phillips. Length: 50mm x 1/4-inch hex. Box of 10.