Beyond the fact of the $20 price difference...
http://www.harborfreight.com/cpi/cta...emnumber=99782
http://www.rockler.com/product.cfm?page=1463
I really hate the unnecessarily huge mark ups. This makes the second time in two weeks I've encountered a double-digit dollar firgure mark-up. I bought a new printer and Best Buy wanted $35 for a printer cable (6' USB A-B). I picked up the same item no-name manufacturer for $2.50 plus $7 shipping (which really was $7 since since I ordered a few other items at the same time).