Instruct: Classify a given review into positive or negative sentiment.
Query: Almost Perfect

My experience is with Jorgensen 3/4" pipe clamps but when I saw the 4 for 3 pricing and free shipping I ordered 8 sets of these 3/4" Irwin clamps. The Irwin 3/4" pipe clamps fit on both threaded and unthreaded pipe, and they are a LOT easier to crank. Jorgensen requires threaded pipe on the head end. Jorgensen sells an aluminum base to hold the bar that doesn't work on the Irwin clamps because the back of the clamp part is higher than the Jorgensen base. Irwin shows the clamps sitting in slots cut into a table perpendicular to the bar in place of this but a non-woodworker must have come up with the idea because the part needs to be moved - can't if it's sitting in a slot. Of course the slot could be the entire length of the bar but then you'd have a table basically just for these clamps.