Features: 7pcs cutter head set,this product contains 6 different pieces cutter head, which meets your different needs. Heavy duty,make from stainless steel materials,the drain cleaner combination is durable and easy to operate. Easy to install, installed on the dredging machine and blade can be easily removed by a key insert the small hole Widely application,this is a set of cutter head for dredging machine. a replacement of the drain cleaner, easily washed away the toilet or pipe plugs, quickly opens up hair, greases or vegetables caused by blocking. Fit spring,there are two small holes under head of knive, which can be fit directly with the spring. Specifications: Materials:Stainless Steel Package Includes: Drain Cleaner Combination Cutter Head Set note: Please allow 1-2cm errors due to manual measurement. Due to the differences betweeen different monitors,the picture may not reflect the actual colour of the item.