VMware Tools Help : Components of VMware Tools : VMware Tools Device Drivers

VMware Tools Device Drivers
Device drivers smooth mouse operations, make VMware features such as folder sharing available, and improve sound, graphics, and networking performance. If you do a custom VMware Tools installation or reinstallation, you can choose which drivers to install.
Which drivers are installed when you install VMware Tools also depends on the guest operating system and the VMware product. The following device drivers can be included with VMware Tools:
The vmxnet and vmxnet3 networking drivers improve network performance. Which driver is used depends on how you configure device settings for the virtual machine. Search the VMware Knowledge Base for information on which guest operating systems support these drivers.
The host-guest file system module, called hgfs.sys on Windows guest operating systems and vmhgfs on Linux and Solaris, is required to use the virtual machine with Workstation or Fusion and share folders between hosts and guests.