Optimized teeth pattern for fast, consistent cutting of steel including stainless. Kit contains the three most frequently used small hole saws: 7/8-Inch, 1-1/8-Inch, and 1-3/8-Inch (22, 29, and 35 mm), arbor, arbor adapter, spare pilot bit and hex key. Bore through wood 2x4s in a single pass. Cuts precise holes in both mild and stainless steel, drywall, ceiling tile, laminates, wood and plastic. Includes a rugged carrying case.