Made by Omega Pacific, this is the ideal device for both rappelling and belaying.  Based on a design by Greg Lowe, the all new and improved SBGII is the smoothest and most versatile device available.  By incorporating a rigid stem, operators can go from full lock-off to whipping rope out in a single smooth action.  No more binding up as the device tries to free itself!  The amount of friction can be completely adjusted to suit your particular need.  Can be rigged for double or single ropes.