| 摘要 |
PURPOSE: A fixation device is provided to easily attach the concrete nails of various lengths and to secure the safety and to prevent the falling down and the breakage of the attaching hanged on the wall. CONSTITUTION: A hook fixation device of the attached has:a locking magnetic body(11); a tightening and loosening mouths manufactured by the synthetic material having durability and elasticity after attaching; a three directional elastic coil spring(5) to be put into the circular hole of an outer body(7); a washer(8); and a bolt(9) to be locked in a nut groove(10).
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