Abstract: A connector for easily secure a socket thereon includes an axle rotatably received in an axial recess in an end of the connector and an inclined slot is defined radially in the body. A spring is biased between a first end of the axle and an inside of the axial recess. A guide portion such as a concavity with various depths is defined in a second end of the axle. A ball is movably engaged with a radial hole in the end of the body and operatively in contact with the concavity. A controller is rotatably mounted to the body and a pin extends through a hole in the controller and the inclined slot and is engaged with a receiving hole in the axle. The pin is automatically rotated backward by the spring when the user releases the controller.

Abstract: A connector for easily secure a socket thereon includes an axle rotatably received in an axial recess in an end of the connector and an inclined slot is defined radially in the body. A spring is biased between a first end of the axle and an inside of the axial recess. A guide portion such as a concavity with various depths is defined in a second end of the axle. A ball is movably engaged with a radial hole in the end of the body and operatively in contact with the concavity. A controller is rotatably mounted to the body and a pin extends through a hole in the controller and the inclined slot and is engaged with a receiving hole in the axle. The pin is automatically rotated backward by the spring when the user releases the controller.

Abstract: A sleeve includes a passage defined therethrough so as to accommodate a polygonal object. A plurality of ridges extend from an inner periphery of the passage at even spaces and grooves are defined between the ridges. Each of the grooves is a rounded groove and each ridge has two side surfaces and a top surface which is in connection with the two side surfaces. A clamp angle between two extension lines of the two side surfaces of each ridge is in a range between 40 to 60 degrees.

Abstract: A ratchet tool includes a handle and a head in which an engaging member is received therein and a pawl is engaged with the engaging member. A link is pivotably received in the handle. A first end of the link is engaged with the pawl and a second end of the link is connected to a control member which is rotatably mounted to the handle. An intermediate portion of said link is pivotally connected to a base member in the handle.