A fastener driving tool includes a magazine unit, a handle, a striking plate, an energy restoring member and a wire bending spring disposed to a housing unit. The housing unit includes an inner housing assembly made from a plastic material, and an outer housing assembly made from a metal material and covering the inner housing assembly. The wire bending spring is biased for storing a striking energy for the striking plate, and includes an extending section and a backwinding section. The extending section has first and second ends. The backwinding section is connected with the second end, and extends and bends toward the first end to terminate at a terminal end portion. The ratio of a height to a width ranges from 1:1 to 1:1.6.

A fastener driving tool includes a magazine unit, a handle, a striking plate, an energy restoring member and a wire bending spring disposed to a housing unit. The housing unit includes an inner housing assembly made from a plastic material, and an outer housing assembly made from a metal material and covering the inner housing assembly. The wire bending spring is biased for storing a striking energy for the striking plate, and includes an extending section and a backwinding section. The extending section has first and second ends. The backwinding section is connected with the second end, and extends and bends toward the first end to terminate at a terminal end portion. The ratio of a height to a width ranges from 1:1 to 1:1.6.

A magazine assembly and a stapler including the same are provided. The magazine assembly includes a base and a rail assembly. The base has a first end portion and a second end portion. A direction from the second end portion toward the first end portion is defined as a first direction. The rail assembly is disposed on the base and adapted for a staple unit to slidably abut thereagainst along the first direction. The rail assembly includes a first rail and a second rail which are separate. A first side wall of the first rail has at least one guide portion extending in the first direction. Each guide portion is adapted for a head of a T-shaped staple to slidably engage therewithalong the first direction. The second rail is adapted for a U-shaped staple to abut thereagainst.

A magazine assembly and a stapler including the same are provided. The magazine assembly includes a base and a rail assembly. The base has a first end portion and a second end portion. A direction from the second end portion toward the first end portion is defined as a first direction. The rail assembly is disposed on the base and adapted for a staple unit to slidably abut thereagainst along the first direction. The rail assembly includes a first rail and a second rail which are separate. A first side wall of the first rail has at least one guide portion extending in the first direction. Each guide portion is adapted for a head of a T-shaped staple to slidably engage therewithalong the first direction. The second rail is adapted for a U-shaped staple to abut thereagainst.

A method for replacing a clincher anvil of a clincher assembly of a fastener driving tool is provided. The method includes removing a first connector connecting the mount to a connecting rod operatively connected to a motor of the fastener driving tool through a first aperture in the housing, aligning second connector connecting the clincher anvil to a portion of the clinching assembly with a second aperture in the housing, removing the second connector through the second aperture, removing the clincher arm from the fastener driving tool, aligning a replacement clincher arm with the portion of the clinching assembly, inserting the second connector through the second aperture, securing the replacement clincher arm to the portion of the clinching assembly, inserting the first connector through the first aperture and into the mount, and connecting the mount to the connecting rod.

A method for replacing a clincher anvil of a clincher assembly of a fastener driving tool is provided. The method includes removing a first connector connecting the mount to a connecting rod operatively connected to a motor of the fastener driving tool through a first aperture in the housing, aligning second connector connecting the clincher anvil to a portion of the clinching assembly with a second aperture in the housing, removing the second connector through the second aperture, removing the clincher arm from the fastener driving tool, aligning a replacement clincher arm with the portion of the clinching assembly, inserting the second connector through the second aperture, securing the replacement clincher arm to the portion of the clinching assembly, inserting the first connector through the first aperture and into the mount, and connecting the mount to the connecting rod.