The Bosch Extreme™ Bi-Metal Arbored Hole Saw is designed for multi-purpose cutting with a 1-1/8" diameter and 8 teeth per inch. It offers 2X longer life and impact toughness. The blade material is bi-metal for durability, and it comes in a sleek black color. This Bi-Metal Saw Blade is ideal for various cutting tasks in home and workshop settings.