This dimple die set works with the Harbor Freight hydraulic press knockout kit. 1.115″, 1.362″, 1.687″, 1.937″, and2.375″ Dimple Dies (2 each)；. Scope of Applicable Materials for Dimple Die Set+Steel Backing Discs：Max forming material thickness is 18ga mild steel and 12ga soft aluminum.
25 mm, 30 mm, 35 mm, 40 mm, 50 mm male + female dimple dies. Swap in the dimple dies and draw the flare with the driver/press (or a vise with the correct hole size). Punch the pilot hole with your knockout set.
