Tungsten-carbide tip provides superior wear resistance in tough applications. Patented four-cutter tip design that provides optimal performance. Large flute volume for fast drilling, dust transport and less clogging. Active-centering tip for optimum guidance when drilling in concrete and reinforced concrete; Diameter: 1-1/4 inches; Usable Length: 16 inches; Overall Length: 21 Inches.
The drill I was sent does not have an overall length of 16 inches, but 11 inches can be used. The part number on the box matches the product description online, but the overall length is 13 inches, of which 8 inches can be used. You can even see it in the diagram on the box the bat came in. Unfortunately I have to use this racquet today or I would return it but I am not happy about receiving an item with an incorrect description.