Profile Classic Hardware Co .,Limited Classic Hardware is a leading manufacturer of twisted in wire brush, tube cleaning brush and strip brush with maintaining quality. Please contact us today for further details! Last activity: on 08/05/2018 Joined: on 08/05/2018 https://www.classicalbrush.com/ Design quotient Earn DQ points by participating in a challenge. What are (DQ) Points? DQ points are a measure of your contributions, they correspond to how active you are in the Research, Ideas and Evaluation phases of a challenge.