Patent pending 4-flute design for fast dust removal</br>Carbide-tipped bit heads are harder?? tougher and more resistant to extreme loads for longer tool life</br>The set includes one each HC2010 (3/16"X 2" X 4)?? HC2040 (1/4"X 2" X 4")?? HC2041 (1/4"X 4" X 6")?? HC2061 (3/8"X 4" X 6') and HC2081 (1/2" X 4" X 6")</br>Storage case for easy access?? organizing and portability</br></br>Product Description</br></br>Carbide tipped for long life in tough applications. Bit runs cooler thanks to improved flute design. Centric tip ensures quick starts in concrete. Wear mark alerts user when tip wears beyond ANSO specification. Optimized brazing and hardening process for long life. Bosch-made carbide tips are tougher and more durable under heavy loads. Set includes: (1) 3/16"x 4" x 6"?? (1) 1/4"x 2" x 4"?? (1) 1/4"x 4" x 6"?? (1) 3/8"x 4" x 6" and (1) 1/2" x 4" x 6". Also includes a reusable rugged case.</br></br>Amazon.com</br></br>The Bosch HCK005 5-piece S4L SDS-plus rotary hammer drill bit set has 4-flute design for fast dust removal. The carbide-tipped bit heads are harder?? tougher?? and more resistant to extreme loads for longer tool life. The set includes one HC2010 bit measuring 3/16-inch by 2-inches by 4-inches?? one HC2040 bit measuring 1/4-inch by 2-inches by 4-inches?? once HC2041 bit measuring 1/4-inch by 4-inches by 6-inches?? one HC2061 bit measuring 3/8-inch by 4-inches by 6-inches and one HC2081 measuring 1/2-inch by 4-inches by 6-inches.</br><br/>http://www.amazon.com/gp/product/B0000TZYZWWa (Musi