The Start Right grip is nice because it is very easy to orient. It helps promote the “pinch” between thumb and forefinger, but is not as good for those kids using their middle fingers as well as the index to stabilize the pencil. (If you want to facilitate the middle finger to be underneath the pencil, see the Grotto grip above). This one not currently available on Amazon.com
http://www.discountschoolsupply.com/Product/ProductDetail.aspx?product=25875