Rotating lock for reversing a roll dispenser

A lock mechanism for a reversible toilet paper holder comprising:

• a lock housing (130) having a longitudinal axis (110) intersecting with a roll holder mount opening (122) on a first end (120), a wall mount opening (132) on a second end (130) opposite the first end, a rotational lock head cavity (150);
• a rotational lock having a lock head (230) with a lock head contact surface (220) having at least a first indentation (212A) on a lock head surface (210) opposite the lock head contact surface;
• at least one lock (290A) configured to rest in the first indentation (212A);
• a tension retainer (300) having at least one tension member (310A) placing a force (320) on the at least one lock in a direction of the longitudinal axis;
• wherein the lock housing has an axial surface (140) and a rotational hole surface (145) with the rotational lock head (230) inside the rotational lock head cavity;
• with the at least one lock nested in the first indentation;
• wherein the lock housing and the tension retainer are configured so that the tension retainer and the lock housing do not rotate around the longitudinal axis or move along the longitudinal axis relative to the lock housing.