General description The 38-55 cm Square Hole Drill Adapter is designed to enhance the versatility of your bench drill and hand drill. This adapter allows for effortless installation and use, making it an essential accessory for woodworking, furniture making, and other related industries. Technical specifications Compatible with drills and hand drills with a diameter between 38 and 55 mm (1.5 to 2.2 inches) Material: Durable cast steel Package includes: 1 x Square Hole Drill Bit Adapter Allowable measurement error: +/- 1-3 cm Installation The tenon attachment is easy to install and remove, allowing for quick adjustments. You can quickly install or remove it yourself, saving time and effort. Usage Ideal for woodworking and furniture making. Ensures precise and smooth drilling operations thanks to its precise design. Other information Note: Square drill bit and electric drill are not included. Prolonged storage in humid environments may cause surface rust, which can be remedied by simply