Carlton's Calls Expert Edge Diaphragm Elk Calls & DVD Combo by Hunter's Specialties - These three proven diaphragm calls produce versatile elk calls from the soft call of a cow, to the scream of a bull bugle. The Expert Edge Instructional DVD is included with the calls. Learn how to use these calls to bring in the big bulls. 3 Proven Carlton Elk Calls Expert Edge Instructional DVD Proven Diaphragms