I was on the fence about getting this after reading reviews saying there were problems with the adjustment screws and so on, but I went ahead and bought it for tuning up my table saws and adjusting 80% jigs for recievers, and I am very glad I went with this product. The adjustment screws do have plastic handles on them, yes, but the plastic is such a thick guage that I don't understand what people were using to break them. A10 lb sledgehammer maybe?