If You Have Rotary Tool Hardware That Is Not Pre-mounted, Then These Screw And Mandrel Sets Will Come In Very Handy For You. These Sets Come In A Package Of 12 Units, Including A 1/4" Screw, A 1/4" Shank Mandrel. You Can Mount A Disc Cutter, Sanding Disc, Etc. And Get The Job Done Efficiently.

* 12 Units In The Package

* 1/4" Screw

* 1/4" Mandrel

* Compatible With Rotay Tools

* Professional Quality