Benton "Tex" Holloway demonstrated percussion and pressure flaking to the Sulphur Rotary Cub yesterday. The two techniques are used in the art of flint knapping, which aims to chip rocks into sharp points that can be up to five times sharper than the sharpest surgical scalpel. The Southwest Louisiana Flint Knappers, a group that has blossomed from five knappers to a high of 99 two years ago, convene at Niblett's Bluff every April during the park's Spring Fest. Last year, auctions on stone items raised over $2,500 for the park. Holloway is pictured with his wares: a collection of handmade stone points, a collection of genuine Native American stone points, larger found rocks with unique qualities.