Saunders Standard, Pro and Extreme models mount on a 3/8" cable rod. The Standard model has a 3" offset, the Pro has a 1 1/2" arm and the Extreme sports a variable 3/8" to 1 5/8" offset. This variable offset allows the dampener to be set at the ideal location. The PSE and rear models attach below the handle and the Mathews Mount attaches on their cable offset arm.