The Enco 4 sided indexing lathe tool post holders feature a 2-1/2 inch size and a 3/8 tool shank. This tool post type offers quick change capabilities, allowing for efficient tool changes on a lathe machine. Perfect for holding various cutting tools securely in place during machining operations. Please see pictures as they are part of the discription. Price is for all three. We would consider dividing them up if ask.