Hand tool

A hand tool comprising:

• a body having an engaging portion defined in an end thereof, the engaging portion having a polygonal recess;
• two control units respectively connected to the body and each control unit having a control member, a sleeve, multiple engaging members, a connection ring and a resilient member, the control member being a tubular member and rotatably mounted to the body, a control portion extending from a first end of the control member and having multiple holes defined annularly therein, each hole having a cone-shaped inner periphery and expanding outward, the control portion having a first connection portion at one end thereof and the first connection portion having outer threads, a flange extending between the control member and the control portion, the flange located close to the holes, the sleeve being a tubular member and having a through bore, a cone-shaped passage, a reception portion and a second connection portion, the through bore defined in a first end of the sleeve, the cone-shaped passage communicated between the through bore and the reception portion, the reception portion being a circular recess and the control member being received in the reception portion, the cone-shaped passage facing the flange, the control portion extending through the through bore, the first connection portion extending beyond the sleeve, a smallest inner diameter of the cone-shaped passage being the same as an inner diameter of the through bore, a largest inner diameter of the cone-shaped passage being the same as an inner diameter of the reception portion, the second connection portion located remote from the through bore and engaged with a second end of the sleeve, the second connection portion having inner threads, each engaging member being a bead and a number of the engaging members being the same as that of the holes, the engaging members being in contact between the flanges and the cone-shaped passage, each engaging member received in one of the holes corresponding thereto, a smallest inner diameter of the holes being less than a diameter of the engaging members, the connection ring having inner threads and mounted to the sleeve and threadedly connected to the first connection portion, a gap defined between the sleeve and the connection ring, the resilient member located in the reception portion, and
• a connection member located between the two control units and mounted to the body, the connection member having two third connection portions respectively located on two ends thereof and each of the two third connection portions having outer threads, the two third connection portions connected to the second connection portions to connect the two control units to the connection member, the resilient member biased between the control member and the connection member, the engaging member being restricted between the cone-shaped passage and the flange and received in the hole, the engaging member contacting against an outer surface of the body.