Bergeon 30615-03 - End-mills for chronograph screw shoulders Including 16 cutters in hard metal

Chronograph Screw Shoulder Cutter

• Hard-metal
• Sixteen 4 mm cutters 
• Sizes 0.40 mm - 1.3 mm 
• Measure the screw diameter, match diameter to cutter hole size, turn screw clockwise to remove shoulder
• Swiss