Klein® Hole Saw Arbor, Threaded, 3/8 in Shank, Hex Shank, 3/8 in Hole Saw dia, 1/8 in Pilot Drill, 4-1/2 in OAL, 118° Point, Split Point, Steel Cutting Edge, Steel, Applicable Materials: Mild Steel, Stainless Steel, Plastic and Wood Klein® 31905 Hole Saw Arbor, Threaded, 3/8 in Shank, Hex Shank, 3/8 in Hole Saw dia, 1/8 in Pilot Drill, 4-1/2 in OAL