The water valve Cutting Blades have a tighter radius reciever strip that tracks more efficiently around the tight radius cut line. This gives better teeth performance and long teeth life.

Part#: A-MM0353

Product Link: https://mrmanhole.com/product/water-valve-cutting-blade-teeth-included/

Resource: https://www.youtube.com/watch?v=Kk90uCB-aos&t=6s