[Suitable for handheld drill]Square hole drill adapter suitable for handheld drill Wear-, high hardness, strong and , long service life. But not suitable for bench drills and rechargeable hand drills [Easy to Install and Remove]The square hole drill bit adapter mortise tool is easy to install and remove, you can install or remove it by yourself, quick and convenient. [Easy to Use]Square hole drill bit adapter holder helps accurate and smooth drilling, Manufacturer: Ounfhtrttk