Rulers, bottle openers, box openers… there are so many tools. You have to buy many different tools for different needs. That is, unless you have US engineer Brian Filko’s multi-tool. He made 20 tools into one device. It has a box opener, bottle opener, scraper (刮削器), screwdriver (螺丝刀), seven wrenches (扳手), rulers and many other tools. The tool is smaller than your finger and weighs just 12 g. You might find it quite useful around the house! TEENS'