Square Hole Drill Bit Adapter Fixing Bracket Sturdy Quickly Install or Disassemble Professional for Drill Machine Accessory black.Square Hole Drill Bit Adapter is made of high quality Stainless Steel material, which is reliable in quality, wear resistant, sturdy and durable.The Square Hole Drill Bit Adapter Bracket fits hand drill clamps and bench drills with diameters between 38 to 55mm/1.5 to 2.2 inches.Square Hole Drill Bit Adapter Fixing Bracket, easy to install and easy to remove, no screwdriver required, you can directly twist the screws, making it more convenient to use.Square Hole Drill Fixed Bracket is very suitable for woodworking and furniture making, and can ensure smooth and accurate drill.Square hole drill bit adapter converter, Professional manufacturing, stable performance, and long life.Square Hole Drill Bit Adapter Drill Accessory. Square Hole Drill Fixed Bracket Steel Casting. Electric Drill Square Hole Bracket spare parts. Drill Machine Holder Converter Clamp Adjustable. Bench Drill Bit Adapter Hand Drill Attachment.