Kinesis Freestyle2 Ergonomic Keyboard w/ VIP3 Lifters for Mac (9" Separation) Left and Right V-Lifters: the V-lifter quickly and easily alternates the slope of the keyboard from 10 to 15 degrees, positioning your forearms and wrists in a more comfortable position by reducing pronation. Integrated, padded palm supports ensures that wrists are neutral while resting. Use with or without the pivot/tether. The pivot tether connects the two keying modules of the Solo keyboard together. Disconnect the pivot tether if greater separation is required Provides a highly stable typing platform with no "bounce".