The Bosch 4-1/2 in. Steel Round Hex Clay Spade Hammer Bit is ideal for general gardening and landscaping. This bit works with a rotary hammer to enable easy digging. Heat-treated steel construction offers strength and durability. Bosch brings constant innovation to concrete and masonry drilling. From inventing the industry standard SDS system to custom-manufactured carbide and diffusion bonding, the result is better performance and durability.