Without installing steel wire spiral sets of handle in both side there is a similar hook shape card slot, when installing a koala turnbuckle, using a special installation tool, don't need to distinguish between the direction of the screw, can be installed directly, it is a screw with tail incomparable, thus greatly improving the work efficiency. And because the koala is not a screw to install the handle, and save the steps to remove the install the handle, further improve the work efficiency, and completely avoid the problems caused by installing the handle to remove.