Our Brand new Baby Mandrel is a 3.1mm barrel made to fit our new Baby bands. 

Details 

• Made of carbide tungsten steel
  
• 3.1mm head size to fit Baby Bands
• Easy "slide on and slide off" with minimal vibration
• Standard shaft width of 3/32"
• Fits all E-file machines 

This piece does not fit standard sized sanding bands.