One squares a glue-up. The other holds a jig while you find the real clamp.
Verdict
Parallel clamps apply even pressure with jaws that stay square to the bar, which is what keeps a glued panel flat instead of bowed. Spring clamps cost almost nothing and hold light work while you position it. Buy parallel clamps for glue-ups, and buy more than you think; buy spring clamps by the bag for everything else.
~$90
Check Jorgensen 24 in Parallel Clamps, 2 Pack Price| Jorgensen 24 in Parallel Clamps, 2 Pack | Spring Clamps for Woodworking | |
|---|---|---|
| Clamping force | High and even | Light |
| Keeps panels flat | Yes, jaws stay square | No |
| Cost each | High | Very low |
| Quantity needed | More than you own | A handful |
| Holds jigs and stops | Overkill | Ideal |
| One-handed use | No | Yes |
You glue up panels. Ordinary bar clamps pull the jaws out of square as you tighten, which cups the panel and produces the bow people blame on the wood. Parallel jaws are what prevent that, and the old joke about never having enough clamps is true.
Check Jorgensen 24 in Parallel Clamps, 2 Pack on Amazon
You need to hold a stop block, a fence, a template or a light joint for a moment. At this price you buy a bag of them and stop thinking about it.
Check Spring Clamps for Woodworking on Amazon
Roughly one every six to eight inches along the joint, alternating above and below the panel to balance the pressure. Too few clamps leaves gaps; alternating prevents the panel bowing.
Firm, with a thin even squeeze-out along the joint. Cranking harder starves the joint of glue and bows the panel, and a starved joint is weaker than a properly clamped one.
For glue-ups, largely yes, because jaw deflection is exactly what you are paying to avoid. For general holding, cheap clamps are perfectly adequate.
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these units side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.