For use in heating (for venting heating systems), air conditioning, plumbing, and building technology, as well as for door and window handles. Equipped with square (5 / 7/ 8 mm), triangular (10 mm), conical square mandrel (4-10 mm), as well as an adapter and bit insert (slotted 1.0 x 7 / Phillips PH2) Attached to a chain.