Atdec Ergotron Kit 98-034 Grommet Mount for LX Single and Dual-Direct Arms, Includes grommet plate, bolt, wing nut, T wrench, cable ties, NOT compatible with the LX Arm with Low-Profile Clamp: 45-626-224, 45-626-216, 45-627-224 and 45-627-216. Install your LX Arm at any location on your desk! It easily attaches through a suitable grommet hole. Compatible with select LX Dual Direct Arm models and single-monitor LX Desk Mount Arm (short pole) models.