Good quality material: these threaded inserts are made of good quality zinc alloy, hard and durable - Usage: pre-drill a proper hole, screw in with internal hex tool; Unique self-tapping designed external thread, contribute to tapping, with good tensile r
For repairing and reducing existing threads - The inserts cut their mounting thread themselves when screwing into a mounting hole - Absolutely secure and secure anchoring in the mounting material - Box contents: 10 thread inserts, female thread M3 x 0.5,