A pliers includes a first member having a first head and a first handle, and a second member having a second head and a second handle. Each of the handles includes a recessed grip area bounded by a forward lip and a rear lip. The rear lip has a cross-sectional area not greater than a cross-sectional area of a portion of the handle adjacent the rear lip and opposite the grip area. The pliers also includes a first grip positioned on the grip area of the first handle and a second grip positioned on the grip area of the second handle.

A pliers includes a first member having a first head and a first handle, and a second member having a second head and a second handle. Each of the handles includes a recessed grip area bounded by a forward lip and a rear lip. The rear lip has a cross-sectional area not greater than a cross-sectional area of a portion of the handle adjacent the rear lip and opposite the grip area. The pliers also includes a first grip positioned on the grip area of the first handle and a second grip positioned on the grip area of the second handle.

The present invention provides an opening-closing device including a first component, a second component and a third component. The second component is rotatably connected with the first component, and the third component is rotatably connected with the second component. The present invention further includes a mode switching device for switching operating modes of the opening-closing device. The operating modes include a conventional mode and a labor-saving mode. When the opening-closing device is in the conventional mode, the third component is fixed relative to the second component. When the opening-closing device is in the labor-saving mode, the third component is rotated in the opening direction relative to the second component during opening of the opening-closing device, and the third component is rotated in the closing direction relative to the second component during closing of the opening-closing device.

The present invention provides an opening-closing device including a first component, a second component and a third component. The second component is rotatably connected with the first component, and the third component is rotatably connected with the second component. The present invention further includes a mode switching device for switching operating modes of the opening-closing device. The operating modes include a conventional mode and a labor-saving mode. When the opening-closing device is in the conventional mode, the third component is fixed relative to the second component. When the opening-closing device is in the labor-saving mode, the third component is rotated in the opening direction relative to the second component during opening of the opening-closing device, and the third component is rotated in the closing direction relative to the second component during closing of the opening-closing device.

A tool adapted to be driven rapidly includes a driving portion which has a first jaw and a second jaw and an opening between the first and the second jaws configured to receive an object to be driven. The first and the second jaws have first and second engaging sides configured to grip the object to be driven. The opening has a closed end, an open end, and two opposite sides respectively delimited by the first and the second engaging sides. The first engaging side extends along a linear line. The second engaging side extends along a curved line. The closed end of the opening has a smaller width than the open end of the opening.

A tool adapted to be driven rapidly includes a driving portion which has a first jaw and a second jaw and an opening between the first and the second jaws configured to receive an object to be driven. The first and the second jaws have first and second engaging sides configured to grip the object to be driven. The opening has a closed end, an open end, and two opposite sides respectively delimited by the first and the second engaging sides. The first engaging side extends along a linear line. The second engaging side extends along a curved line. The closed end of the opening has a smaller width than the open end of the opening.

A tool having gripping jaw teeth that provide a contact pattern for engaging fasteners on-axis. The gripping teeth are formed in a depression disposed at a distal end of a jaw and are oriented at an angle that turns away from a major axis of the tool or an axis that is orthogonal to a plane formed by a front face of the jaw to increase the gripping force that can be applied to the fastener before the tool disengages or slips against the fastener.

A tool having gripping jaw teeth that provide a contact pattern for engaging fasteners on-axis. The gripping teeth are formed in a depression disposed at a distal end of a jaw and are oriented at an angle that turns away from a major axis of the tool or an axis that is orthogonal to a plane formed by a front face of the jaw to increase the gripping force that can be applied to the fastener before the tool disengages or slips against the fastener.

A hand tool includes a handle section, a working end operably coupled to the handle section, and a jaw assembly disposed at the working end. The jaw assembly includes a movable jaw and a fixed jaw. A span defined between the movable jaw and the fixed jaw is adjustable. Each of the movable jaw and the fixed jaw includes an array of teeth defined by ridges that extend substantially parallel to each other. The array of teeth on each of the fixed jaw and the movable jaw includes a first set of teeth having a first width and a first depth, and a second set of teeth having a second width and a second depth. The first depth is less than the second depth and the first width is less than the second width.

A flush valve installation tool and associated method is used to install and uninstall chrome flush valves. The installation tool is capable of installing and uninstalling nuts of a variety of sizes without causing damage to the surfaces of the nuts. The flush valve installation tool has opposing first and second members coupled together by a pin or bolt. The first and second members each have two or more smooth jaw faces configured to engage 4 or 5 surfaces of a nut to be installed or uninstalled. The flush valve installation tool can be adjusted to select the distance between opposing jaw faces to accommodate different sized nuts.