Specifications:
Material: Emery + Diamond
Colour: as shown in the picture.
Shaft diameter: 3 mm 
Grinding head diameter: 4 mm 
Sharpening stones total length: 46 mm 
Grinding wheel effective length: 24 mm
Item quantity: 6 pieces / set.
Box contents:
6 x Chainsaw Sharpener Burr Stone File / File Chainsaw Sharpener