Thumb Score: +36 Amazon has Bosch Bulldog 3/8" x 18" SDS-Plus Alloy Steel Masonry Drill Bit (HC2067) on sale for $2.99. Shipping is free w/ Prime or on orders $25 or more. Thanks knive Lowe's also has Bosch Bulldog 3/8" x 18" SDS-Plus Alloy Steel Masonry Drill Bit (HC2067) on sale for $2.99.