Top up your Makedo cardboard construction tools with: 50x Makedo SCRU XL. See how easy it is to connect more cardboard using Makedo cardboard construction tools! Use the Makedo SCRU-DRIVER and SCRU XL to join 3 or more layers of cardboard together. Simply punch a hole through the material, insert the SCRU XL into the socket on the end of the SCRU-DRIVER, and then with a few quick turns the cardboard will be securely joined.