I'm no fan of shear bolts especially when it comes to post augers, this slip clutch arrived in time well packaged and works great. Plenty of videos on the Tube on how to "slip" the clutch and install it. Best used on the implement end of the PTO shaft, it came set for 45hp but I had to back the nuts off until they sat flush with the stud bolt ends just to get the thing to slip for initial break in, kept them as such for use on my auger and the only time it catches (kicks in) is when the auger is truly stuck. The only semi-gripe I have is the smooth shaft on my auger gear box is just shy of a true 1 3/8" which, after comparing to other smooth shaft gear boxes is common. There's a lot of waller room, to fix this I ordered 1/2" to 3/8" reducer bushings online, for some reason the bolt hole on the gearbox of my old auger was 3/8" not the normal 1/2" so I had to do some....urban rigging as it be, a trip to my local hardware store for anew 3/8" bolt and nyloc nut, problem solved. It attached to the Vevor PTO shaft I purchased just fine, works like a champ now. Both TSC and RK had similar clutches (probably made by the same people) for well over twice the cost. People complain about the finish paint not holding up which seems accurate but it's a freakin' PTO clutch. Also, it does not come with replacement clutch discs, only the one installed on assembly, I'm not quite sure about this company's ability to provide good American-standard product support, but that's just my assumption given where it's made and the price. But hey, it works and that's that.
Angelo 
