1. This product is required to be used on a flexible shaft with a detachable handle such as a hanging mill, a table mill, a drill shaft or a table saw. It cannot be used alone.2. The handpiece chuck is made of stainless steel, and has long service life.3. Good heat dissipation ability makes you can use it longer at a time.4. The handle is stable and has great performance while using.5. Professional and practical design with beautiful appearance, easy to carry and use.Specification:Features:This product is required to be used on a flexible shaft with a detachable handle such as a hanging mill, a table mill, a drill shaft or a table saw. It cannot be used alone. The handpiece chuck is made of stainless steel, and has long service life. Good heat dissipation ability makes you can use it longer at a time.The handle is stable and has great performance while using. Professional and practical design with beautiful appearance, easy to carry and use.Specification:Size:0.34mm/0.010.16inMaterial:Stainless SteelPackage List:1*Handle1*KeyNote:Due to the high speed , the bearing heats up and the handle heats up. After using for 10 minutes, it must be stopped for 2-3 minutes to cool down to avoid overheating of the product, and then use it after the machine has cooled down completely.