Diamond honing stone 40x2x2 200/160 Price for 16pcs.ABH diamond honing stones are designed for machining high-precision holes in parts made of cast iron, steel, various alloys and non-metallic materials, machining liners and engine cylinder blocks, connecting rods, gears, cylinders of hydraulic systems and shock absorbers, parts of fuel equipment.The use of diamond stones made from high-quality diamond powders and special bonds ensures high honing performance and durability of the stones. The bars are used both for processing cast iron and hardened steel.