The DEWALT® 5-Pack Flex™Torq 1/4-in x 3-1/2-in Phillips impact driver bits are made using their advanced hardening process which translates to maximum durability. Their Flex™Torq techlogy enables the bits’ reflex cores to flex up to 15degrees as it absorbs some of the hammering action of the impact driver. This feature prevents breakage of the screw tips and the bits themselves and further improves the product’s durability and longevity. Each bit is CNC-machined, ensuring an accurate and optimal fit into recesses of the screws. This means that these bits can be used in bit tip holders for driving screws into a wide variety of materials. The 5-Pack Flex™Torq 1/4-inch x 3-1/2-inch Phillips impact driver bits can also be used together with the 10X Magnetic Screw Lock System which fastens screws in place, preventing drops and wobbles for a more accurate and efficient driver action.