WUTA Leather Chisel All-Polished Pricking Iron Adjustable 2-6mm French Style Leather Chisel Sharp Leather Punching Tool Set (Obverse Adjustable 2 Teeth+2.7mm 8 Teeth+3.0mm 8 Teeth)

1. Loosen the two middle nuts to the center of the screw rod.

2. Align the inner sides of the punching teeth with the punching distance line to be adjusted.

3. Slowly turn the outer nut to align the outer sides of the punching teeth with the other punching distance line.