LENOX Tools Carbide-Tipped Hole Saw Set, 8-Piece Electricians (30295-600CTL) Precision-ground carbide teeth cut clean, perfectly round holes quickly and easily. Over-drilling stopper prevents the tool from penetrating beyond the hole depth you want. The split-point pilot drill penetrates quickly, self-centers, and won't "walk" across the work surface Kits includes hole saw sizes selected for specific trade applications. Compact, impact-resistant plastic with metal hinges and latches resists tough workplace conditions, closes securely, and is lockable.