Norton Gemini Type 18R Snagging Plugs Type 18R round tip plug with tough durable aluminum oxide abrasive for heavy duty work. Versatile can be used with most ductile irons and steels. Provides consistent performance at an economical initial price. Good general purpose choice for numerous small foundry snagging offhand grinding and stock removal jobs on medium- high-horsepower inline grinders and flexible shaft grinders. Pack of 1