Oregon Grinding Wheel (4-1/8" x 3/16") OR4125-316
      The high-quality grinding wheel leaves a precision finish on saw chain and work with 310-120 and other mini Oregon Grinders. For use with: .325" (20,21,22,95 chains only), 3/8" (all except 90 & 91 chains),.404". 
    
      
    
  - Diameter: 4-1/8"
 - Thickness: 3/16"(4.8mm)
 - Arbor Hole: 7/8"