555 motor size: 78 35mm / 3.1 1.4in. ♪ 555 motor size: 78 35mm / 3.1 1.4in. ★ 555 motor size: 78 35mm / 3.1 1.4in. Type: B10 drill chuck kit, JTO drill chuck kit (optional). tool set can exercise and improve your hands-on ability.
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