The dewalt xr brushless impact driver uses brushless motor technology for improved runtime and durability it features a 3 led halo ring that provides maximum illumination of the work piece the impact driver has a 635mm drop in keyless hex driver to allow quick one handed fitment the aluminium front housing provides greater heat dispersion helping to increase motor life an ergonomic handle and rubber overmould reduces vibration and user fatigue dcf886d2 2 x 18 volt 20ah xr li ion batteries dcf886