These are my 12" clamps.  The red handle are from Homier, www.homier.com, and cost about $2.25 each not a bad clamp but not as good as the ones with natural wood handles.  I got them from Ebay dealer ID "mydealsdirect" though there are others that sell them but he was closest so I figured the freight would be less.  These have the ratchet that keeps them from sliding and with freight were about $2.50 each.