Product review (5 stars): Easy to install and look great.
This is a great buy.  The knobs are well made and look great on my old Tappan gas range.  They also come with adapters to fit different length stems for easy installation. Over time the adapters wear from the torque of twisting. However with a little tweaking and shimming with duct tape (guy's cure-all) I have kept them serviceable. For the price, compared to an "original" set, I keep and extra set of these for just- in -case.