General description High-quality bi-metal hole saw designed for high precision cutting of holes from 14mm to 152mm diameter in various materials such as metal, plastic, stainless steel, steel, and wood, with a cutting depth of up to 29mm thick. The Bahco Sandflex® Variable Pitch Holesaw features durable cobalt steel construction with bi-metal teeth for long-lasting performance. Technical specifications Diameter: 20mm Cutting depth: up to 29mm Teeth per inch (TPI): 4/6 Material: Bi-Metal (Cobalt steel with bi-metal teeth) Number of pieces: 1 Compatibility and accessories Compatible with standard electric drills and drill presses Suitable for drilling in metal, plastic, stainless steel, steel, and wood Arbors available separately: BAH3834930: 14-30 mm, 3/8 Inch (8.5mm) BAH38341130: 14-30 mm, 7/16 Inch (11.1mm) BAH38349100: 32-100 mm, 3/8 Inch (8.5mm) BAH383411152: 32-210 mm, 1/2 Inch (11.1mm) BAH383411152C: 32-210 mm, 1/2 Inch (11.1mm) BAH383416152: 32-210 mm, 5/8 Inch (15.4mm)