A method and cytology device for manually adjusting the depth of endocervical sampling, and simultaneously sampling the endocervical canal and outer cervix using a dual-brush system. The device (38) comprises a primary cone-shaped endocervical sampling brush (40) adjacent to a secondary donut-shaped cervical sampling brush (42). The primary brush handle (52) is joined to the secondary brush handle (54) by means of a slidable rail (78), allowing adjustability of the primary brush length. The desired length and depth are visible by means of aligning incremental markings or measurements on the primary brush handle (80) with the positioning mark on the secondary brush handle (82). The brush handles are fixed in position and stabilized by means of a securing sheath (58), which has a pinch-release option to release or restore the friction existing between the sheath and the brush handles.
