75mm oil filter seals, iv no idea why i save them when i service my car?

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1mm outside diameter hypodermic needles, i drilled the seals with a .75mm drill (by hand)
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squash for unusual shape
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plenty of holding force, the first seal is happily holding the weight of the second two blocks, i can slide each block around to square up but there is enough resistance for reasonable machining especially in acetal plate

i have used the smaller pads to cut 28mm washers out of 1mm alli, i had one failure with it creeping... it takes a light touch. they will be fine for my engraving job