Features 1、Suitable for degreasing of engine cylinders with diameters of 3/4 in to 2‑1/2 in and 1‑1/4 in to 3‑1/2 in. 2、Flexible shaft, easy to use and automatic centering. The knurling wheel can adjust the spring pressure of the stone on the cylinder hole. 3、Remove carbon deposits and hot glazes from cylinder holes. Ideal for removing rust deposits from older re‑ builds. 4、Adopt premium iron material, antirust, anti‑corrosion and durable, ensures long lifespan. 5、Ergonomic design, easy to operate, labor-saving, high work efficiency, bring much convenience for you. Specification Condition: Brand New Item Type: Cylinder Honing Tool Material: Iron Manufacturer Part Number: 88233 Range: Approx. 51-165mm/2-6.5in Usage: Step 1. Spray lubricant on the stones or the cylinder bores. Get the hone set up on the drill. Step 2. Insert the engine hone into the cylinder and run the drill at low speed between 300-700 RPM. Move the hone up and down around once a second. Don't push or pull the stones more than 3/4 inches out of the cylinder. Don't run the engine hone for more than 3 mins. Step 3. After honing, use a paper towel to wipe out the inside of cylinder. Package List 1 x Cylinder Honing Tool