Point Blank Knock Down Elk Calls - These calls from Point Blank are easy to use. Each call has an aluminum frame that bends to format the pallet shape for a secure fit every time. The reeds are made of super thin prophylactic material. All of these calls are good for cow and calf talk, as well as a variety of bull noises. The single reed is good for young bulls, the double reed is good for medium bulls, and the triple reed is good for old bulls. Make a variety of elk soundsSingle, double, or triple reedAll calls good for cow and calf talkMore reeds good for older bullsAluminum frame that bends for a secure fit