a super fast & easy way to remove Phillips screws with damaged heads (size #0, size #1 and size #2) no power, no drilling and no hammer required to get a damaged screw out (<< this being for Phillipsscrew sizes #0, #1 ...if the screw head is size #2 *and* heavily damaged, then a DBZ-52 'hammer-in' type bit is also supplied to facilitate the screw's removal) the foremost part of the driver handle has an integrated hex metal nut - this accepts a 13mm spanner (not supplied) to allow bolstering (applying high leverage/force) on a particularly stubborn/stuck screw driver handle has a 'go-through' solid steel inner core & top cap, thereby allowing safe hammering of the handle driver handle accepts standard 6.35mm (1/4") hex drive shafts, Weight: 0.61949895622 Pounds, Manufacturer: ENGINEER