Double safety unit prevents screw tap from wearing out.

二重安全离合器装置能防止丝攻之折损.

Blade tools: eyebolt, turning tool, Allen key, screw tap, milling cutter, drill bits, etc.

刀刃工具类：埃令螺丝（吊环）、圆车刀、六角匙、丝攻、铣刀、钻咀等。