Not Locking Properly.
Try flicking the tool open then carefully closing and opening again. If this does not work after 5 tries please exchange the tool for a new one. Click To Exchange
Loose Clip/ Screws
Loosening of screws on any tool is expected. But with a wood frame tool it can happen faster than metal frame tools. Make sure to keep all screws tight. You can buy a screw driver kit with all the bits you need for $5. Click Here To Get a Screw Driver Kit