The Bosch 10 In. SDS-plus® Bulldog™ Xtreme Star-Point Chisel Twist is designed with a unique twist shape, which provides less-frequent bit-jamming. The twist shape delivers a wider material-removal footprint for greater productivity than straight point chisels. This self-sharpening tool provides longer life and no additional sharpening hassle. A worldwide leader in accessory manufacturing, Bosch uses an inductive hardening process for its chisels for high quality and longer life.