This Thorsman plastic clip with screw 2190051 (set of 50 pieces) is intended for indoor or outdoor installation of round cable in walls and ceilings, with or without a plug Screw with surface treatment according to corrosivity class C3 and cross-slotted head type Philips No 2 Color: white Material :C3 steel, clip PP (polypropylene), electroplated steel, screw steel TCS-C3 screw clips consist of a clip in impact-resistant polypropylene with high UV-resistance and is provided with an electroplated steel screw The clip can be fitted without drilling in double and single plasterboard, wood, board materials and low-density concrete with high density It is also suitable for hard materials like concrete or bricks The screw has a high pitch for quick installation and a sharp point, and the head is cross-slotted of either type Phillips 2 or of type T20. It penetrates directly into most materials In concrete and bricks it only needs a 4 mm hole