The long bit is suitable for installing screws in hard-to-access places in all fastening areas, e. g. deck boards, cladding, etc. It is suitable for common electric/cordless screwdrivers and can therefore be used either directly or with an adapter. The long bit is well-suited to use in relatively inaccessible screw positions. Fastening can be achieved easily without the chuck damaging the boards.The long bit is well-suited to use in relatively inaccessible screw positions. Fastening can be achieved easily without the chuck damaging the boards.Hint6 long bit packs (20 bits in one size) just plug them together and you get a practical storage box.