General description Bahco Sandflex® 3830-21-C Bi-Metal Variable Pitch Holesaw is designed for precise cutting of holes ranging from 14 mm to 152 mm in diameter in various materials up to 38 mm thick. It features varipitch (4-6 TPI) blades with high-speed steel cutting edges for enhanced hardness, welded seams for accuracy, and heat-treated bodies for maximum durability. This holesaw is suitable for use with portable electric or pneumatic tools, as well as in drilling, boring, milling, and other machine tools. Technical specifications Diameter: 20 mm Material: Cobalt Steel Type: Single Cutting edge material: High-speed steel Compatibility and accessories Compatible with portable electric and pneumatic drills Arbors available separately for different shank sizes: - 14-30 mm shank (3/8 inch or 7/16 inch) - 32-100 mm shank (3/8 inch) - 32-210 mm shank (1/2 inch or 5/8 inch) Installation Attach the appropriate arbor to the holesaw based on the shank size Secure the arbor in your drill or