This clamp is the ONLY clamp to have.  First, only buy pipe clamps.  Second, only buy Jorgensen--they have smooth action and easy re-setting, and they are cost-effective.  Third, only buy this model, with the crank handle, because you can get the  highest torque for the least strain on your hands/fingers.  With pipe clamps, all you need is the appropriate length of threaded pipe--which is CHEAP.  Go to the hardware store, buy a 12" length of their threaded pipe--you've got a great clamp.  Buy a 36" length of their threaded pipe--you've got another great clamp.  Know what I'm sayin'?  You can have loads and loads of variable length clamps for CHEAP!!!