| 摘要 |
<p>The device has a filling lock for inserting a pin into hollow screw heads of any form, a safety ring for rounding of outer edge screws of any form, and a safety cover for imposing half moon shaped caps with angular outer edge screws of any form. A slightly larger pin is inserted in a socket-head cap screw or hollow key screw with pliers or a percussive tool. The safety ring is smaller than the screw head, so that the ring clamps firmly on the screw head, and the safety cover is clamped completely over the screw head.</p> |
