Heated and pressed-scored
Standard 3 Ring, (Three) Rings, 4.25" (4-1/4 inch) Center to Center.
Standard 3 hole, (Three) holes, 4.25" (4-1/4 inch) Center to Center.
A portrait style binder with hinges and rings on the 17" side, the 2" Angle-D ring allows for standard 3-Hole punching equipment and is mounted to the back panel. Made from sturdy .055 gage polyethylene, works great out in the field or in an office setting.