It's for fitting the Rivnuts. As i said look on Egay, just type in Rivnut. I would try and borrow one if i were you. All you need is a bolt to screw into Rivnut a washer and nut. Put nut on bolt then washer, bit of grease then Rivnut, push in hole hold bolt tighten nut. When tight unscrew bolt from Rivnut. Job done.