Square Hole Drill Adapter Durable for Drill Accessories Silver Drill with 4 Parts Description: [ Material]: The square hole drill bit adapter is made of stainless steel, which is reliable in quality, wear-resistant, sturdy and durable. [Size]: Square hole drill adapter fits hand drill clamps and table drills with diameters from 38 to 55 mm/1,5 to 2,2 inches. [Recessed Table Drill Attachment Accessories]: Square hole drill adapter mounting bracket, easy to install and easy to remove, no screwdriver required, screws can be turned directly, making it more convenient to use. [Widely Used]: The square drill bit fixed bracket is great for woodworking and furniture making, and can ensure smooth and accurate drilling. : Square hole drill adapter converter, professional production, stable performance and long service life. The package includes: Optional