Bi-metal hole saw kit. Optimized teeth pattern for fast, consistent cutting of steel including stainless. Kit contains the most popular sizes for basic electrical work, 7/8, 1-1/8, 1-3/8, 1-3/4, 2 and 2-1/2 inch saws. Recommended for most major brands of 6 inch recessed lighting fixtures. Bore through 2x4s in a single pass. Multiple leverage points for easy slug removal. Includes two arbours and a rugged carrying case.