The Knipex 00 11 04 Profi-Key is suitable for all standard shut-off systems in the supply of gas water and electricity for technical installations in buildings e g heating air conditioning and ventilation systems shut-off valvesmains switch-boards etc Supplied with a securing chain It has the following functions 3 x Square 5 7 & 8mm 1 x Triangular 9-10mm 1 x Two-Way 3-5mm 1 x Long Execution Conical Square 6 7 8 & 9mm 1 x Double Ended Bit Slotted 10x7mm and PH2 1 x 14in Bit Adaptor