Use metal and, this collector nozzle features rust proof,, stable construction that ensures long time and during cutting tasks Compatibility with Angled grinders, stone cutting machines, Tiles cutter and marble processors, great for construction sites, home renovation and woodworking or cooling application Efficient remover Systems transform cutting into water with water usage, providing clear visibility during operations while keeping your machine clean and extending its lifespans for work efficiency Simple installation process, simple connecting the nozzle to your cutter, thread the hose through the end nut, insert and tighten, ready for freely operations within minutes without special tool required This set includes 2 collector nozzles with a 6mm (0.23 Inch) diameter opening and clamping capacity for materials up to 5mm (0.19 Inches) thick, please verify dimensions before purchase, Manufacturer: JSGHGDF