The Shark Industries Ltd BT5A 5 Piece Aluminum Carbide Burr Set is a great addition to your toolkit. This set includes five carbide burrs that are made from high quality aluminum. These burrs are perfect for use with a variety of materials, and they are sure to make your projects easier and faster. The Shark Industries Ltd BT5A 5 Piece Aluminum Carbide Burr Set is a great addition to your toolkit. This set includes five carbide burrs that are made from high quality aluminum. These burrs are perfect for use with a variety of materials, and they are sure to make your projects easier and faster.