The RIDGID 37968 Megapress 1" jaw, when used with the appropriate RIDGID Press Tool, is designed to mechanically press MegaPress fittings onto pipe to create a permanent water or gas tight seal. MegaPress is a registered trademark of Viega GmbH & Co. When the switch on the press tool is depressed, a motor powers a hydraulic pump which forces fluid into the press tool cylinder. This moves the tool rollers forward into contact with the 37968 attachment and applies thousands of pounds of force to the specially designed fitting. The entire pressing cycle takes between 4 and 8 seconds starting from when the switch is pressed. Once the pressing tool starts to deform the fitting, the tool will automatically continue the press until complete. the 37968 is a 1" Standard Series MegaPress Jaw designed to mechanically press MegaPress and MegaPressG fittings onto 1" nominal pipe size (NPS) steel pipe. An individual jaw set is required for each pipe size. Standard Series Jaw sets are designed to be used with RIDGID Standard Series Press Tools and cannot be used with RIDGID Compact Series press tools. Jaw sets and press tools must be used perpendicular to the fitting/pipe being pressed.