【High Quality】：Made of high quality sebific duct material, this flex shaft is strong and for long time use 【Flexible to Use】： Installing the flexible extension cord on mill is more flexible to use, convenient just like holding a pen 【Universal Fit】：Universal part fits the majority of rotary tool, as long as your electric grinder tool and electric drill can fit for 3.175mm diameter clamping 【Easy Installation】：This flexible shaft is easy to install, just need to clip the connector handle grip to the mill 【Suitable for】：This flexible shaft is supporting electric grinder or electric drill (The shaft without the machine)