Fitment：For #50 chain，power transmission in the fields of agricultural machinery,woodworking machinery and machine tools. Package included：1 x Roller Chain Sprocket,2 x Screws Size：#50,5/8 inch Pitch,1 inch Bore,10 Teeth,1/4" x 1/8" Keyway,Outside Diameter 2.30",B Type. The sprocket is made of ANSI 1045 carbon steel,and the teeth are hardened with high-frequency quenching heat treatment，High hardness,more wear.Sprocket overall blackening treatment,rust,corrosion resistance. The sprocket itself is easy to maintain, easy to install, and can run smoothly in harsh environments.