Features: Fitted with Fine Stones. Knurled Nut Controls Tension. Flexible Shaft for ease of use and self-centering. Flexible shaft, controlled spring action and spread control limiter are features which contribute to faster changing from one cylinder to another with fastest cutting action. Specifications: Item: Engine Cylinder Hone Range: 1-1/4" to 3-1/2" / 31.75mm to 88.9mm 3 replaceable 2-Inch long 220 grit stones Package Included: 1Set x Engine Cylinder Hone /w 3Pcs Stones. .