These shear pins work fine and saved me during a recent storm. I had one pin broken and no spares so I was getting only 3/4 of the power of the snowblower.
Replacing the pins was easy with a little 3-in-1 oil. I drove the old pin out with the new pin, slid it in place and with a pair of needle-nose pliers tied the cotter pin.
Shear pins might be a problem on gravel driveways, but on my 300' paved driveway, they function fine. This is the first pin I've replaced in 4 years!
Craftsman Replacement Snow Thrower Shear Pins is recommended by BHLakeville