Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fits few

The knob is only suited for appliances where the shaft you are attaching the knob to extends beyond the surface where the knob seats. It includes a set screw for gripping the shaft and you might need access to tighten the set screw when seated on the shaft.My AC unit has a recessed shaft that this knob could not reach.So useless. Fitz all needs to develop an extension tube that could be cut to size and fit on their knob and a recessed shaft to make this truly a fit all product.Fitz All 1345 appliance knobs.