我想我什至抱有很高的期望……
我想即使在阅读了一些不那么赞美的评论之后我仍然抱有很高的期望。 不幸的是，我的期望没有得到满足。 用普通钻头钻孔后，我能够拆下一个螺栓。 抓斗的钻孔部分不会切割它。 事实上，它是靠几个螺栓行走的，导致我不得不扩大原来的孔。 提取器很快就会失去很多咬合力，所以它无法抓住它！ 我带来了专业版，以为我能让它发挥作用……它仍然需要改进。
Oh Bob we hate to hear when this happens. In situations like these we always emphasize to use a very slow RPM and importantly both the drill and extract should be done in reverse (counter clockwise). It sounds like you drilled out with another bit which likely caused your stripped bolt to be pushed down further. If you’re using too high an RPM (or in clockwise action) it will cause the Grabit to wear prematurely. The Grabit Pro does self-center but if you have any issues a quick center tap punch usually can help the issue. Slow & steady and you should have more success and not lose grip.