QD pneumatic casing elevator/spider is applicable for casing of 60~622mm(23/8~241/2 in) It features labor saving, safe and pneumatic operation. It is a kind of ideal tool for casing operation. The company has developed a wide variety of mechanized wellhead tools for oil drilling and production with a full set of models, including more than 50 series and more than 100 models including ZQ drill pipe power tong series。