Expandable reamers may include a housing and at least one blade supported by the housing. The at least one blade may be movable between an extended position and a retracted position. The at least one blade may be in the retracted position when a first actuation member is in a first longitudinal position and a second actuation member sleeve is affixed to the first actuation member. The at least one blade may be movable to the extended position when the first actuation member is in a second longitudinal position and the second actuation member is affixed to the first actuation member. The at least one blade may be in the retracted position when the first actuation member is in the second longitudinal position and the second actuation member obstructs an opening in a sidewall of the first actuation member.