Flare nut wrenches have a gear mechanism on the single end head that allows the wrench to rotate freely in one direction without removing the wrench head from the fastener and repositioning the wrench. The ratcheting wrench head allows a line or other obstruction to pass through it, then closes for full contact around the fastener. The opposite end of the handle provides a more secure grip on the full length of the handle than a double end flare nut wrench. The 12-pt. design has additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench. These single-end wrenches come in SAE (inch) sizes.

Flare nut wrenches have a 6-pt. design that allows more contact with the fastener's sides than the 12-pt. style and prevents rounding the fastener's corners. They have a standard, fixed head and an opening in the wrench head that allows a line or other obstruction to pass through it. These double-end wrenches are SAE (inch) size and have a different size on each end so that each wrench can be used for two different size fasteners.

Flare nut wrenches with a 6-pt. design allow more contact with the fastener's sides than the 12-pt. style and prevents rounding the fastener's corners. They have a standard, fixed head and an opening in the wrench head that allows a line or other obstruction to pass through it. These metric double-end wrenches have a different size on each end so that each wrench can be used for two different size fasteners.

These flare nut wrenches have a 12-pt. design with additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench. They have a standard, fixed head and an opening in the wrench head that allows a line or other obstruction to pass through it. These double-end wrenches are SAE (inch) size and have a different size on each end so that each wrench can be used for two different size fasteners.

Flare nut wrenches have a flex head on each end that can swivel up to 90° to access fasteners from multiple angles. They have an opening in the wrench head that allows a line or other obstruction to pass through it. The 6-pt. design allows more contact with the fastener's sides than the 12-pt. style and prevents rounding the fastener's corners. These double-end wrenches are SAE (inch) size and have a different size on each end so that each wrench can be used for two different size fasteners.

These flare nut wrenches have a 12-pt. design with additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench. They have a standard, fixed head and an opening in the wrench head that allows a line or other obstruction to pass through it. These metric double-end wrenches have a different size on each end so that each wrench can be used for two different size fasteners.

Ratcheting flare nut wrenches have a gear mechanism on the single head that allows the wrench to rotate freely in one direction without removing the wrench head from the fastener and repositioning the wrench. These metric wrenches have a head design on one end of the handle that allows for full contact around the fastener while allowing a line or other obstruction to pass through it. The opposite end provides a more secure grip on the full length of the handle than a double end flare nut wrench. The 12-pt. design has additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench.

These flare nut wrenches have a flex head on each end that can swivel up to 90° to access fasteners from multiple angles. They have an opening in the wrench head that allows a line or other obstruction to pass through it. The 6-pt. design allows more contact with the fastener's sides than the 12-pt. style and prevents rounding the fastener's corners. These metric double-end wrenches have a different size on each end so that each wrench can be used for two different size fasteners.