This foot is good for sewing leather, lycra, plastics, vinyl etc. Securing the tricky materials to easily glide over with the Teflon base on the foot. Suitable for Standard Straight Stitch Industrials Such As: Juki 8100, Juki 8700, Juki 7000A, Juki 8000A, Jack F5, Jack F5H, Jack A4, Jack A5E, Older Brother Industrials etc. For the Stronger Version Please See – Premium Metal Teflon Foot (Industrial Only