College Contemporary Metals Tie Bar. Our Purdue Boilermakers Tie Clip is a matte finished, solid brass, fashion forward accessory. This Purdue Tie Bar includes a complementary nailshead patterned gift box. Each Tie Clip is made of rhodium plated brass. This Boilermakers Tie Bar will add a touch of style to your dress attire, not to mention keeping your tie in place. Made from solid brass, this piece will hold firm and is built to last. Go Boilermakers!! Officially licensed Purdue Boilermakers fan gear.