Abstract: A powder actuated nail gun includes a body, a trigger unit, a nose assembly. The body includes a first tube and a second tube. A room is defined in the second tube. The nose assembly includes a nose, two balls, two pressing members, two resilient members, and a collar. The nose includes a base, a tubular portion and a passage. The base includes two recesses in which the two pressing members are received. The two balls are located in two elongate holes of the base. When the nose assembly is moved toward the grip, the balls are pressed between the pressing members and a strike rod in the nose so that the strike rod is co-moved with the nose assembly. The piston of the strike rod is moved to a ready-to-shoot position in the cylinder. The nail gun is able to shoot nails continuously.

Abstract: A powder actuated nail gun includes a body, a trigger unit, a nose assembly. The body includes a first tube and a second tube. A room is defined in the second tube. The nose assembly includes a nose, two balls, two pressing members, two resilient members, and a collar. The nose includes a base, a tubular portion and a passage. The base includes two recesses in which the two pressing members are received. The two balls are located in two elongate holes of the base. When the nose assembly is moved toward the grip, the balls are pressed between the pressing members and a strike rod in the nose so that the strike rod is co-moved with the nose assembly. The piston of the strike rod is moved to a ready-to-shoot position in the cylinder. The nail gun is able to shoot nails continuously.

Abstract: An adjusting and positioning device for wooden boards includes a first part and a second part. A cover unit is movably connected between the first and second parts. A driving unit is connected with the cover unit. An activation member is engaged with the toothed portions of two racks of the driving unit. A sleeve includes a shaft that movably extends through the sleeve. The shaft includes spiral teeth, and two arms are threadedly engaged with the spiral teeth. The arms are pivotably connected with two clamp members which are slidably connected to a base. When the first part and the second part are gripped by a user, and the cover unit is pressed, the shaft is moved to pivot the arms which drive the clamp members to move along the guide grooves of the base to control a distance between two adjacent boards by one hand.

Abstract: A device for installing expansion bolts includes a case with a first motor located therein which is connected with a direction switch. A first transmission shaft is connected to the first shaft of the first motor, and drives a rotary unit. A movable unit is connected to the rotary unit which drives the movable unit linearly. A fixed member is connected to the front end of the case. When an expansion bolt extends through a plaster wall, a bolt head of a bolt is engaged with the first notch of the movable unit. The first motor is then activated to co-rotate the first transmission shaft and the rotary unit to drive the movable unit linearly, so that the sleeve of the expansion bolt expands outward to contact the inside surface of the plaster wall.

Abstract: A pneumatic nailer includes body for receiving the piston therein and a barrel is rotatably and movably inserted in a connection tube extending from the body. The piston rod is movably inserted in the barrel for ejecting the nail fed in the barrel. A magazine is connected to the barrel so that the magazine is rotatable relative to the body so that the magazine is rotated a new position and used in a space that the conventional magazine cannot be inserted.

Abstract: A pneumatic nailer includes body for receiving the piston therein and a barrel is rotatably and movably inserted in a connection tube extending from the body. The piston rod is movably inserted in the barrel for ejecting the nail fed in the barrel. A magazine is connected to the barrel so that the magazine is rotatable relative to the body so that the magazine is rotated a new position and used in a space that the conventional magazine cannot be inserted.

Abstract: A power stapler includes a body with a barrel and a handle is connected to the body by a connection plate. The handle has an open bottom end and an end member is engaged with the open bottom end. A connection portion extends from the handle and a magazine is connected between the connection portion and the barrel. The connection portion has a groove for receiving an L-shaped wrench. A safety device is connected to the barrel and has a link which contacts the trigger device.

Abstract: A power stapler includes a body with a barrel and a handle is connected to the body by a connection plate. The handle has an open bottom end and an end member is engaged with the open bottom end. A connection portion extends from the handle and a magazine is connected between the connection portion and the barrel. The connection portion has a groove for receiving an L-shaped wrench. A safety device is connected to the barrel and has a link which contacts said trigger device.

Abstract: A nailer includes a casing and a piston rod extends through a neck of the casing. A sleeve is connected to the neck and a passage is defined longitudinally through the sleeve so that the piston rod is movably inserted into the passage. A slot is defined through a wall of the sleeve and communicates with the passage. An action rod is inserted in the passage and a hole is defined through the action rod. A pin extends through the slot and the hole. A spring has an end contacting the first end of the action rod and the other end of the spring contacts a flange extending from an inside of the neck. The action rod will not descend when the nailer is put upside-down.