Our patented Secure-Lock ratchet-action closure and push-button release clamp head, found on the award-winning Pro-Elite Repair Stand, became so popular we decided to make it compatible with steel bike shop repair stands. The versatile and patented 3.25? (8.3cm) wide clamp is capable of managing any bike frame, up to 2.6? (6.6cm). When you see the Pro-Elite Commercial Clamp upgrade in your bike shop, you know you're in the presence of experts. NOTE: This is NOT a suitable upgrade for our folding tripod repair stands. Please contact Feedback directly to order the Pro Elite folding clamp head assembly.