This 3.5mm bit is compatible with Item 74122 Modeler"s Punch 
It offers a size not included with the standard punch, increasing your modeling options!
It can also be use without the punch handle to create small circles from masking tape or in thin pla plate.
Includes 1 bit, crafted from durable chrome molybdenum.
Item comes with protective oil applied to the bit to prevent corrosion. This oil must be removed before use.