Die set 122 and 123 or 124 are used in combination to form the smallest curls possible provided that the inside diameter is at least three times the material thickness. Die Set 123 is used when an off center curl is desired and required two hits; and 124 is used for an on center curl in three hits. When forming heavier gauge material, a tool steel insert can be used.
Die set 125 and 126 are used to minimize whip up. Die set 125 forms an off center curl in three hits, and die set 126 forms an on center curl in four hits. Both sets can be designed to accommodate material up to 16 gauge and curls between 1/4" and 3/4" inside diameter.