Profi-Key Key for heating, air conditioning, plumbing and building technology, e.g. for door and window handles or for radiator-bleeding. With grub screw (3 mm) for mounting and removing door and window handles. For 5 different locking systems. With reversible bit: 1.0 x 7 mm slot and PH2 cross slot. With adapter for 1/4 bits chained to key. Total length: 89 mm. self-service card/blister. - Capacity square: 5.0 / 7.0 / 8.0mm- Capacity triangular: 9.0 — 10.0mm- Step-wise square / driving square: 6 — 10mm- Grub screw (external hexagon): 3mm- Bit holder 1/4 (hexagon socket): 1/4 in14- Bit: PH2 / slotted 1x7