Screw the BaerFix insert with the cutting slides pointing downwards on the inserting tool and then lock the BaerFix insert with the nut by wrench. Screw the BaerFix insert into the borehole, the BaerFix thread insert is self-tapping and the inserting tool has a 1/4″ hexagonal shank and can be used by either a cordless drill or a socket / spanner.