Gibraltar SC-SUGC Super Universal Grabber Clamp The gripping surface is 2 1/2 times larger than SC-UGC The Gibraltar 2-hole Super Universal Grabber Clamp boasts double multi-clamps Accepts 5/8"-1-1/2" arms and rack tubes Gripping surface is 2-1/2 times larger than SC-UGC The Gibraltar 2-hole Super Universal Grabber Clamp boasts double multi-clamps