VARIO adapter 1/2"|The impact wrench-compatible VARIO adapter turns impact wrenches into tappers, which extends the range of the work application by an entire additional tool. For all impact wrenches with a 1/2" external square tool mount. |Lightweight, tool-free exchange of FEIN VARIO consumables. Compatible with all FEIN VARIO accessories â?? twist drills, countersinks, and tappers. Tools for easy mechanical drilling, countersinking, and tapping up to".|For 3/4" and larger, we recommend the FEIN VARIO adapter 3/4" with a larger tool for faster work progress. Unlike drill/drivers, impact wrenches enable users to work easily and powerfully when tapping.|The adapter is easy to push on and with the help of a locking spring or circlip, can be attached for permanent use.