The doublestuff is the 303f (fine grit) and the 303m (medium grit) bonded together to create a tool with a variety of sharpening options.Use dry, without oil, water or lubricants and clean with a plastic scouring pad and powdered abrasive cleanser.This pocket stone is packaged in a leather carrying case.Made in the usa.

Type: Sharpening Stone
Open Length: 5"
Sheath: Leather
Handle Description: N/A
Sharpener Material: Ceramic Stone
Sharpener Type: Medium, Fine