Features: brand new and high quality Made of manganese steel material, the drain cleaner combination is sturdy and durable and easy to operate. This product contains 6x different pieces cutter heads & 1x for key, which meets your different needs. It is easy to be installed on the dredging machine and the blade can be easily removed by a for key insert the small hole. There are two small holes under the for head of the-knife, which can be fit directly with the spring. This is a set of cutter for head for dredging machine. A replacement of the drain cleaner, easily washed away the toilet or pipe plug, quickly open up the hair, grease or vegetables caused by blocking. Specifications: Material: Manganese Steel Color: Black Package Includes: 7x/Set Drain Cleaner Cutter Set note: 1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.