length:67-74mmUse:Wood Drilling Model Number:3-12mm/4-12mm/4-20mm DIY Supplies:Woodworking Type:Core Drill Bit Origin:Mainland China Straight slot design for precise drilling : The straight slot design of this drill bit ensures precise drilling, making it perfect for woodworking projects that require accuracy. Blackened pagoda drill tool set : This drill bit set is blackened, which gives it a sleek and modern look while also providing superior durability and longevity. Reaming and hole opening capabilities : With its reaming and hole opening capabilities, this drill bit can handle a variety of woodworking projects, from simple to complex. Hexagonal shank for added stability : The hexagonal shank of this drill bit provides added stability, making it easier to use and more reliable for your woodworking needs. Product handle: hexagonal handle (can be installed on electric tools such as electric screwdriver) Product surface treatment: blackening Product specification: 3-12mm/4-12mm/4-20mm