Dawn GFX Gland Removal/ Install Tool Kit. Do not use with impact. 
 
Key Features:
Integrated 3/4" hex
Comes with both large and small gland removal tools
 
Fitment:
Most GFX cylinders after 2007
 
Specifications:
3/4" Hex
Small Gland Tool Diameter - 1.875 in
Large Gland Tool Diameter - 2.25 in
Material - Stainless Steel