Key features

• •Content and Material: You will get 1 square hole drill bit adapter and 4 pieces of square hole drill bits. Square hole drill adapter is made of all steel castings, which is strong and sturdy. Note: If it's stored in a humid environment for a long time, it may cause some surface problems, just wipe some protective oil to improve it.
• •Suitable for: Square hole drill bit adapter is suitable for benchtop drill presses and electric hand drills. Clamp diameter range is about 38-55mm/1.50-2.17 inch. Coming with a screw for enhanced fixation.
• •Easy to Use: Square hole drill bit adapter is easy to install and disassemble. Coming with a assembly drawing, you can quickly install and disassemble it. Serving your time and energy.
• •Practical Tool: Square hole drill bit adapter can ensure accurate and stable drilling operations. There are 4 pieces of square hole drill bits in distinct sizes: 6.4mm/0.25 inch, 8mm/0.31 inch, 9.5mm/0.37 inch and 12.7mm/0.5 inch.
• •Note: This square hole drill bit adapter is not suitable for lithium battery electric drills and bench drills without round hole bearings. It's suitable for old-fashioned bench drills and household bench drills, please note this point before ordering. If your bench drill needs to use a square hole drill bit, please use it with an adapter included in the set.