Thumb Score: +33 Bosch HC2163 1 In. x 10 In. SDS-plus Bulldog Rotary Hammer Bit - $6.28: Linky [amazon.com] OOS Lowes has the same item on clearance if your local store has it: Linky [lowes.com] deadbroke mentioned that the Bosch HC2107 5/8 In. x 18 In. SDS-plus Bulldog Rotary Hammer Bit is also on sale: Linky [amazon.com] >Temporarily out of stock, still able to order