Top up your Makedo cardboard construction tools with: 75x Makedo SCRU.See how easy it is to connect cardboard using Makedo cardboard construction tools! Use the Makedo SCRU-DRIVER and SCRU to join cardboard together. Simply punch a hole through the material, insert the SCRU into the socket on the end of the SCRU-DRIVER, and then with a few quick turns the cardboard will be securely joined.