Features 1、HARD MATERIAL: The rotating grinder adapter is made of alloy steel and has been heat treated for high hardness and long service life 2、THREAD ADAPTER CONVERSION TOOL: Specifically designed for mounting US thread grinding machine accessories, such as drill bits, to US thread machines, enhancing the versatility of the grinder 3、POLISHING MACHINE INTERFACE ACCESSORIES: Can be widely used in US thread drill, stone hole saw, wood carving disk, cup wheel, wool polishing wheel, chain saw wheel and contour wheel 4、GRINDER ADAPTER CONVERTER: Compatible with US thread mounting thread hand power tools such as angle grinders, grinder saws, concrete angle grinders and wet polishers 5、EXCELLENT PERFORMANCE: Angle grinder attachment converter is made with fine workmanship, possess compact appearance and stable performance, can make sure durability and stability Specification Item Type: Angle Grinder Adapter Material: CVR steel Package List 2 x Angle Grinder Adapters