Specification model:

4-6 inch chainsaw gear 1 set of 4-inch gear (round hole

4-8 inch gear 1 set square hole 4 inch gear (square hole

One 4-6-inch Pinion

8-12 inch chainsaw gear (square inner hole)

8-12 inch gear 1 set of round hole

4-10 inch sprocket (match 1/4 chain 9 tooth sprocket

One 8-12 inch Pinion

4-8-inch sprocket (matching 1/4 chain 7-tooth sprocket