Fixing with worm screwsCan also be used as a knob handle hole partWith the countersunk screw, it is possible to screw the knob onto a rosette or long backplate at the same time as an attachment for an 8 mm square spindle is included in the M12 thread in order to use it as a rotary knobFire protection information:In accordance with ÖNORM B3859:2014 suitable for use on fire doors according to EI230-C, approval of the door manufacturer requiredFire protection test: ÖNORM B3859Surface: galvanised black passivatedModel: HALL, SÖLLDesign: Door knob angular fixed screwableDimension(mm): 52 x 52Material: IronMark: HalcöSquare spindle(mm): Directed for 8Rosette/long plate: withoutRosette(mm): -Style: rusticThread(mm): 18Thread: M12Fixing accessories: Countersunk screw M12Content information (ST): 1.