Lenox® Hole Saw, Arbored, Series: 3915, 4-1/4 in Dia, HSS/Bi-Metal Cutting Edge, HSS/Bi-Metal Body, Use Arbor: 2L, 3L, 6L and 7L Standard and 2L, 6L Snap-Back™, Applicable Materials: Metal, Plastic and Wood

• Tuff Tough™ design is reinforced to cut stronger and last longer
• Patented Vari-Tooth® design resists tooth strippage
• High speed steel teeth resist breaking and offer extended life
• Thick backing plate with holes for drive pins resists damage due to high torque
• Long lasting, fast cutting and versatile
• The 4 in Pipe tap features unique tooth shape that provides evenly distributed cutting force over a wider area of the tooth