Grip tight spikes

[GattaFish]

The right size hole in the washer will fit around the auger and stop on the head. I have even experimented cutting a groove to accept the washer and give it even more support.
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[parker23]

These are 1/4" flat zinc washers from Home Depot.
Washer manufactured by Crown Bolt Part # 19821

12/package for a couple of bucks.

[puppet]

Originally Posted by parker23

These are 1/4" flat zinc washers from Home Depot.
Washer manufactured by Crown Bolt Part # 19821

12/package for a couple of bucks.

I think I used the same. 1/4" hole allows enough to rotate through the auger but locks to the
spike head. I just bought a 100 pack from lowes....probably $5.