【HIGH QUALITY】Made of high quality tungsten carbide cutters, hardened steel body to ensure its high hardness, anti-rust, solid and durable. Dimensions: Drill diameter: 40mm, Shank diameter: 10mm, Drill depth: 60mm, Total length: 90mm. Clean and neat holes: This TCT (tungsten carbide) drill bit set is perfect for hardwoods to drill precise flat-bottomed holes in hardwoods or softwoods without chipping (drilling depths up to 60mm). 【WIDE APPLICATION】 It can be used to drill holes in wood and plastic products, furniture, door hinges and tables. For cutting wood, plywood, solid wood boards, MDF, plastic, etc. 【Warm reminder】 Smaller diameter drill bits can be used under ordinary hand drills. However, since we are all large Forstner drill presses, it is best to use a machine with good clamping capabilities for drilling work, for example: B. Drill press, e.g. bench drill, vertical drill press, etc. (if applicable). When using a hand drill for operations, it is best to use it with a vise