OEMTOOLS 25028  Adjustable Brake Cylinder Hone Range: 13/16" to 2-1/4" (21 mm to 58 mm) Controlled Pressure for Faster, Smoother Honing Action Includes 3 Medium (22) Grit 1-1/8 In. Stones Flexible Shaft Stones for Use with Hone Include: #2528M Medium Grit (220) 1-1/8 In., #2528F Fine Grit (400) 1-1/8 In.