Used in Colposcopy Procedures for Better Visualization of Distal Endocervical Canal. Kogan Endocervical Speculum is a Gynecology Instrument. It is Stainless Steel Used for Holding of Tissue or Skin During Surgery Procedure. The Kogan Endocervical Speculum is one of the most popular brand names used by physicians. The Kogan Speculum comes with or without the measuring ratchet. Kogan Endocervical Speculum is a gynecological instrument and widely used for better visualization of the distal endo-cervical canal. Finger Ring Handle with Opposing Fenestrated Blades.