Bi-Metal Hole Saw Kit, 8-Piece Klein Tools 31902 Optimized teeth pattern for fast, consistent cutting of steel including stainless Kit contains the most popular sizes for basic electrical work: 7/8-Inch, 1-1/8-Inch, 1-3/8-Inch, 1-3/4-Inch, 2-Inch and 2-1/2-Inch (22, 29, 35, 44, 51 and 64 mm) saws Recommended for most major brands of 6-Inch (152 mm) recessed lighting fixtures Bore through 2x4s in a single pass Multiple leverage points for easy slug removal