Steel Dragon Tools 1/2" x 1" High Speed Steel Annular Cutter with 3/4" Weldon Shank 1/2" x 1" depth of cut HSS annular cutter Diameter of cut: 1/2" - Cutting Depth: 1'' - 3/4" Weldon Shank Large holes can be drilled up to ten times faster than regular drills bits Make overlapping holes, slotting holes and edge cuts Made from tough, high-speed tool steel - Each specific size laser etched on shank