The first toilet seat (3) is mounted to the hinge pin (6) at two points, one on each side of a point at which the second toilet seat (8) is mounted.

A bending chute is formed at the lower part of the car stop bar, the fixed seat is connected with a shaft pin in a penetrated way, and the shaft pin penetrates through the bending chute.

A sawing tooth setting pliers for woodworker comprises hinged left and right handles, pusher pin and pusher pin seat.