Drill Bit Extension Connecting Rod 150/300mm 1/4” Hex Shank Screwdriver Bit Holder Extension Bars Extender Electric Drill Tools

[Features]:1. Made of carbon steel material, sturdy and durable.2. Simple operation, convenient use and fast perforation speed.3. Equipped with a 1/4 inch hexagonal handle, easy to install.4. The use of the connecting rods will reduce the concentricity of the connected product.5. Double thread internal wall fixed, 7mm standard caliber can be inserted into screwdriver bit, woodworking flat drill, four-edge supporting roller drill and other 1/4" hexagonal handle drills.6. Double threaded inner wall fixation, adjusted and fixed with a hex wrench, with a secure slot. 9.5mm standard round inner interface can be inserted into screwdriver bit, drill bit.[Specifications]:Type: Drill Bit Extension Rod Connecting RodMaterial: carbon steelShank type: 1/4inch hex shank/9mm round shankInterface inner hole diameter: 7mm/9.5mm round interfaceTotal length: 150mm, 300mm, 114mm,173mm