A lockout device is provided for an instrument having a body and an actuating member extending from the body for operating the instrument. The lockout device includes a bottom member, a cover member, and a flexible member. The bottom member and cover member are adapted to receive a cinching portion of the flexible member between first and second holding surfaces of the bottom member and cover member. When the flexible member is wrapped around a portion of the body and received between the first and second holding surfaces and the cover member is in a closed position, the first and second holding surfaces prevent movement of a cinching portion of the flexible member.