[Premium Material] Square hole drilling fixing brackets are made of all-steel castings, which are strong and . It adopts a versatile, efficient way to quickly attach or remove a drill attachment. Note: If stored in a humid environment for a long time, it may cause some rust, which can be improved by simply wiping some protective oil. [Bench Drill Hand Drill Dual Purpose] The Square Hole Drill Bit Adapter is compatible with both drill presses and hand drills, making it a versatile tool for a wide range of applications. It is particularly effective for woodworking, furniture making, and other related industries. [Mortising Attachment for Drill ] Square hole drill bit adapter is fit for benchtop drill presses and hand drill clamp diameter ranging between 38 to 55mm/1.5 to 2.2inch, allowing for effortless installation and use. Your ultimate solution for enhancing the versatility of your table drill and hand drill. [Easy to Install and Remove] This square hole drill bit adapter is easy to