1. The product has a built-in battery lock for fixing the combined battery. The battery lock is made of high-quality and strong plastic material, which is durable and convenient.2. Built-in battery and tool buckle, anti-skid and anti-loose design, to ensure that the battery and the tool are perfectly matched, safe and reliable.3. It is suitable for converting 18V lithium battery to Black & Decker,Porter Cable, 18V 20V lithium battery tool converterType: Convertercaveat:1. Since the converter has a built-in protection board, if you do not use it for a long time, please separate the converter from the battery to avoid damage to the battery2. The converter does not support battery charging3. Please confirm the relevant battery type and use the machine at the time of purchase to avoid errors.colour: blackMaterial: plasticSize: 11x8.5x5.5cmPackage Contents:1 x Battery Converter AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.