I purchased one of these as a spare for a couple generic punch down tools I own. It appears to be of the same design. The barrel portion of this blade is about 1/32 of an inch larger than the socket of my tools, so it will not fit. The blade ends do seem to fit over my style 66 telephone terminal block. Showing specifications for these blades may have prevented me from buying this blade. I'll keep it. Perhaps I will buy the Monoprice tool for it some day.
I hope I just got a defective blade. Maybe it did not get shaped properly. Great price. I could not find one cheaper than twenty dollars. I have to hold the 66 block and pull very hard to get the punch down tool off the pin.
PROS: it fits in my punch down tool and cuts the wire well.
CONS: It gets stuck on the pins of the 66 block. I have to hold the 66 block and pull very hard to get the punch down tool off the pin.
I don't know what was going on with others finding this blade to small to fit. I tested it on a few different blocks from different manufactures that were produced over the last 20 years and it fit fine on all of them. I rate is an upper mid-level fully functional product. the finish is a little rough but honestly who cares. it works.
There are numerous reviews saying this blade won't fit a 66 block. Later followups seemed to indicate the issue was fixed. I took a chance and ordered one. They are still too small. I've already requested a RMA refund.
I discovered these bit problem comments after my defective bit arrived. This bit probelm has not been corrected. I pointed out that this is a known problem, but was blindly sent another useless bit. Insanity is doing the same thing over and over while expecting different results.
CONS: I have two of these bits, and both are too small to fit over the terminal. The replacement bit is even smaller than the original.