length:65-74mmUse:Wood Drilling Model Number:Hexagon extension rod DIY Supplies:Woodworking Type:Other Origin:Mainland China Versatile Hexagon Screwdriver Set : This 3-piece set includes color hexagon screwdrivers, providing a versatile tool for various screw changing needs. Ideal for electric screwdriver usage. Square Head Socket Tool : The square head socket tool is designed to fit perfectly with electric screwdrivers, enhancing the efficiency of your work. DIY Woodworking Supplies : This tool set is perfect for DIY woodworking projects, making it an essential addition to your toolbox. Brand Trust : Manufactured by a reputable brand, this tool set guarantees quality and durability, ensuring long-lasting performance. Chinese Origin : Originating from Mainland China, this tool set reflects the country's renowned craftsmanship in the field of tools and hardware. Product specification: square head size is 1/2 "(12.7mm), 3/8" (9.5mm), 1/4 "(6.35mm) Shank diameter: 6.35mm hexagonal shank on opposite side, double R groove