A protective member for a medical instrument includes a body portion having an inner side wall defining an interior, configured to receive at least a portion of the medical instrument. The body portion also includes a first end and a second end, wherein at least one of the first end and the second end is configured to at least partially close the respective first end and/or second end of the body portion. The at least partially closed first end and/or second end is configured to be opened for use of the medical instrument, such that the medical instrument can pass through both the first and second ends of the body portion during use, while the inner side wall surrounds a portion of the medical instrument. The body portion is configured for use during a medical procedure using the medical instrument, for example, as a tissue protector or a drilling guide.