防滑型活头千斤顶                                                                                                                                                                                                                                                                                                                                                   1，采用45#钢材制作而成，顶部有防滑块，表面煮黑防锈，在调整工件时能有效阻止工件滑出支撑点避免发生事故，本产品运用了梯形螺纹增加了它的支撑强度，在调整工件时不会出现突然滑落，造成工件损坏。                                                                                                                                                                                                                                                                                                                                                                      2，本产品顶部防滑面采用淬火   硬度达到7.8以上，它能有效地抓住工件不会侧滑     。                                                                                                                                                                                                                      3，本产品使用和保养，在使用本产品时，不要磕碰螺距，用后要清理螺距上的污垢涂抹机油，本产品不主张在水下使用，在无法避免的情况下，用完要及时清理螺距上的水渍，涂抹机油，以备下次使用不会出现螺距锈死，无法使用