Construction for Intensive Use: Engineered with a robust aluminum alloy shell and a solid steel bearing core, this attachment is built to endure the rigors of construction sites and industrial environments, ensuring and reliability in high-stress applications. Multi-Size Nut Compatibility: This versatile tool accommodates nuts on 1/4", 3/8", and 1/2" threaded rods, making it a universal solution for securing conduit racks, strut systems, and other heavy-duty installations, thereby eliminating the need for multiple separate tools. Efficient Drill Conversion Feature: Transform any standard drill into a powerful nut driver with this attachment, significantly cutting down on the time required for assembling tubular frames, structural supports, and other repetitive fastening tasks, enhancing productivity on the job. Optimized for Complex Installations: Designed to glide smoothly along threaded rods in any position, this tool simplifies the process of tightening nuts in hard-to-reach places, including multi-level structures and overhead spaces, making it indispensable for intricate assembly work. Ideal for Both Professional and DIY Projects: Compatible with most standard drills, this nut driver attachment is perfect for a wide range of users from professional electricians and HVAC technicians to home DIY enthusiasts working on conduit supports, maintenance, and complex assembly tasks. Color: Black Material: Aluminum Alloy Package Contents: 1*Nut Zipper Drill Attachment Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.