From the Manufacturer
The Starrett KS288 door lock installation hole saw kit contains 2 of the most common bi-metal high speed straight pitch hole saws used in door, installation applications as well as an arbor and arbor adaptor. Packed on a card.
While Starrett is widely known for its precision tools, the company's first saw blades appeared early in its history. Today, Starrett offers a broad line of industrial quality blades covering a vast array of applications. At Starrett, we continually test our blades against competitive products for performance and life-cycle. This diligence, coupled with our on-going tooth geometry and edge material research, assures the best possible blade life and performance.