4Pcs Forstner Bit Extension Metal 6-11/16Inch Extra Long Forstner Drill Bit Extension Rod Sturdy Drill Bit Extension Post with 4 Wrench for Forstner Drill1

Parts List:4×Post4×WrenchDescription:This forstner bit extension is used to extend any shank drill bit an extra 5-3/8 inches. It adopts high carbon steel structure, which can ensure it is strong and durable.Feature:Easy to Install: The package includes 4pcs forstner bit extension and 4pcs wrenches. To hold the shank in place, use a hex wrench to tighten these screws.Durability: This forstner bit extension is made of metal material, which can ensure durability. It can help you use a standard drill bit to drill flat-bottomed holes or start deep hole turning projects.Specification:Product Name: Forstner Bit ExtensionMaterial: MetalSize:Total length: 169mmShank diameter: 9.35mmInner diameter: 10.5mmColor: SilverNotes:1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color.2.Please allow slight dimension difference due to manual measurement.

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• [Sturdy and Durable] The triangular shank diameter is 3/8inch, overall length is 6-11/16inch, extended length is 5-3/8inch. It adopts high carbon steel structure, precision ground and polished to ensure strong and to use.
• [Purpose] This forstner bit extension can extend any shank drill bit an extra 5-3/8 inches to help you use a standard drill bit to drill flat-bottomed holes or start deep hole turning projects, such as on larger vases or containers.
• [Size Details] The collet inner diameter is 2/5 inch (10.5 mm). This tolerance is very tight and is designed to accept drill bits with shank sizes of 2/5-inch, 3/8-inch, or smaller.
• [What You Get] It includes two set screws and hex key. To hold the shank in place, use a hex wrench to tighten these screws.