Our patented Secure-Lock ratchet lock and push-button clamp head, found in the award-winning Pro-Elite repair stand, became so popular that we decided to make it compatible with steel bike shop repair stands. The versatile and patented 3.25? (8.3cm) wide clamp is able to handle any bike frame up to 2.6? (6.6cm). When you see the Pro-Elite Commercial Clamp Upgrade in your bike store, you know you're in the presence of experts.