Create clean, professional lightening hole flares in sheet metal with this dimple die set, available in individual sizes or a complete 8-size kit. Ideal for fabrication, automotive panels, brackets, and custom metalwork, these dies produce strong, consistent flares with a clean finish.
Manufactured in the USA from industrial-grade, high-strength polymer (not PLA), these dies are designed for durability, excellent layer adhesion, and repeated use in shop environments.
Size Options
Select from individual sizes or the full kit:
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Single Sizes: 10 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm
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Complete Kit (8 Sizes): 10 / 20 / 25 / 30 / 35 / 40 / 45 / 50 mm
Save $40+ compared to buying individually
What’s Included
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Single Size Option:
1 × Dimple Die Pair (Male + Female)
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Complete Kit Option:
8 × Dimple Die Pairs (Male + Female, one of each size)
Key Features
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Creates clean lightening hole flares / swaged holes
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Compatible with hydraulic knockout drivers (Harbor Freight style)
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Works with shop press, vise, or bolt and nut setup
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High-strength polymer construction (not PLA)
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Designed for consistent, repeatable results
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Made in the USA
Material Capacity
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Up to 18-gauge mild steel (~1.2 mm)
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Up to 12-gauge aluminum (~2.0 mm)
How to Use
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Punch a pilot hole using a knockout punch or drill.
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Deburr the hole edge.
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Install the dimple die set.
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Apply pressure using a hydraulic driver, press, vise, or bolt setup to form the flare.
Tips for Best Results
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Use steel backing washers/discs for support (not included)
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Apply a light dry lubricant to reduce friction and wear
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Ensure pilot hole matches die size for proper forming
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Always wear safety glasses and proper PPE
Not Included
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Hydraulic punch/driver
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Knockout punches
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Bolts, nuts, or clamps
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Steel backing discs
Why Use Dimple Dies
Dimple dies strengthen sheet metal by adding rigidity while reducing weight. They also improve appearance and are commonly used in automotive fabrication, racing panels, brackets, and custom builds.