Feature:1. This product is a lithium battery wrench adapter to make work more convenient.2. The conversion head is made of carbon steel, which is more strong and durable.3. Adopts threaded adapter design, which can be used to transfer various electric drill chucks.4. Adopting high-tech conversion head surface with special technology, greatly extending the life of the conversion head.5. With strict quality control and quality assurance, high safety factor, can be used with peace of mind.Specification:Item Type: Electric Wrench to Square AdapterMaterial: Carbon steelAdapter Thread: G1/2inPurpose: Electric wrench thread G1/2in to square adapterAdapter Size: Approx. 34.9mm / 1.4in12.9mm / 0.5in12.6mm / 0.5in21.7mm / 0.9in5.5mm / 0.2inScrew Size: Approx. 4.9mm / 0.2in19.6mm / 0.8in Package List:10 x Wrench to Square Adapter