The Knipex 00 11 03 7-Way Cabinet Control Key is suitable for control cabinets and shut-off systems in the supply of gas, water and electricity. It is ideal for technical installations in buildings, such as air conditioning, ventilation systems, shut-off valves, mains switch-boards, etc. Supplied with a securing chain. It has the following functions 3 x Square 5, 6 & 8mm. 1 x Triangular 9mm. 1 x Two-Way 3-5mm. 1 x Double Ended Bit (Slotted 1.0x7mm and PH2). 1 x 1/4in Bit Adaptor.