Bosch HC2146 7/8 In. x 10 In. SDS-plus® Bulldog™ Rotary Hammer Bit is $19.30 at Amazon, down from the store's own list price of $35.79. That's 46% off ($16.49 less). We last checked this price on Nov 6, 7:48 AM ET. Prices at the store can change at any time, so check before you buy. Brand: Bosch. Type: Power tools. Picked for all trades and Carpentry & Framing.