No predrilling necessary in most applications Can be used in ledger applications Unique "box" thread design with raised-ridge technology significantly reduces driving torque and installation time Hex-washer head provides large bearing area 1/2-in. hex driver bit included (replacement bit — BITHEXR12-R1) Stainless-steel structural fasteners designed for lag-screw replacement. These hex-head fasteners require no predrilling, making them easier and faster to install than typical lag screws. They meet 2018 and 2021 IRC and IBC code requirements for several common wood-framing applications.