Heavy Duty Washer Ring
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I am going to show you how to make a ring from a 3/8" washer
Find Washer and Tools
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I used a galvanized 3/8 flat washer, but you can use any other washer as long as it is wider than your finger.
You will need: a stepper drill bit, a file or a dremel tool and a small hammer.
Start Hammering
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Start rotating the washer on its edge. Simultaneously, tap the washer on its edge with a hammer.
Keep Hammering
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The edge of the ring should start to bow out from the hammer blows and the diameter of the washer should be getting smaller.
Note: I didn't hammer the edge of the washer enough.
Widening
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Once the diameter of the washer reaches the right size, you can use the stepper bit to widen the hole in the center of the washer.
Inspecting
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Once your done with the stepper bit the washer should start looking like a ring.
Widen Some More
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Using a dremel tool, or a file, finish up the inside of the ring.
Finished Product
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This is what you should get when you are finished although to be honest, mine is too big.