General description Wood Twist Drill Bit Set includes 7 pieces of high-quality carbon steel spiral hole cutters designed for woodworking. This versatile tool kit features drill bits with diameters of 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, and 18mm, all with a total length of 230mm (9.05 inches). The unique SDS handle design ensures a secure fit, preventing slippage during operation, making it suitable for both hand drills and drill presses. Technical specifications Material: Carbon steel Diameter sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm Total length: 230mm (9.05 inches) Usage Ideal for drilling holes in wood, wood products, plastics, and plywood Suitable for industrial hinge installation, woodworking maintenance, model making, and drawer assembly Can easily enlarge existing holes and drill circular arcs Designed for boring concealed hinges and door locks