3Pcs Round/Hexagonal/Square Firewood Splitter Machine Adapter Extension Wood Shank Split Cone Reamer Drill Bit Split Drilling Woodworking ToolsFeature:1. Made of high-quality high carbon steel, with super strength, impact resistance and wear resistance. It is not easy to break because of the vibration.2. Three types of extension rods: square chuck + round chuck + hexagonal chuck, different models and sizes can meet all your needs, and can be used for different types of electric drills.3. Unique design, easy-to-use-geometric shape reduces friction and saves time. You just need to install the drill bit in the electric drill. Specification:Material: SteelSize: About 64x3 2mm/2.52x1.26in Interface Diameter: 12.5mm/0.49in Quantity: 3pcsNote:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-3mm measuring deviation due to manual measurement.3 X Split Cone Extension Rods