The Dimple die is used by compressing the two haves together which will strengthen the sheet metal by putting a flange or a lip on the out side edge of the circle, after the sheet metal it has had a hole cut in it. This system is used in the aircraft and off road circles where less weight is wanted.
Thanks for asking. :O)
Last edited by Captainleeward; 02-14-2015 at 07:25 AM.
Sorry my mistakes in english.
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