1. Size information 1 x black zinc alloy bolt deburring tool that works well on 1/8'3/4' (3mm20mm) screws or bolts, helping deburring rods easily. Its detailed dimensions are shown in picture. 2. Efficient thread deburring tool Removes burrs on threads easily and quickly without grinding them on a bench grinder, saving time and effort while providing a more secure finish. 3. Sharp and sturdy Made of zinc alloy with 3 internal grinding blades of tungsten steel. The blades are hard and wearresistant, producing clean, consistent cuts and speeding up the grinding process. 4. Easy to use Quickrelease hex shank with a diameter of 1/4' (6.35 mm) and detachable design, allowing use with most types of rotors and making installation and cleaning straightforward. Use scenarios Deburring threaded screws or bolts after cutting to ensure smooth mating with nuts or tapped holes. Repairing burrs on threads in metal chassis, automotive, or machinery assemblies to prevent crossthreading and seizure. Cleaning and finishing threaded rods or bolts during DIY projects, furniture assembly, or precision machining where clean threads improve performance.