Abstract: A portable screwdriver has a tip cartridge movably mounted inside the portable screwdriver. The tip cartridge can protrude from and be stored in the portable screwdriver and has multiple clamps formed, which hold the tips that can be individually detached from the tip cartridge and mounted on the portable screwdriver. Thus, the portable screwdriver is compact and facilitates carrying. Moreover, the portable screwdriver stores the associated tips inside and effectively prevents the tips from being lost.

Abstract: A screwdriver includes a hollow cylindrical body with multiple elongated holes defined in an outer periphery of the hollow cylindrical body to communicate with inside of the hollow cylindrical body. Bit compartments are provided to be pivotally connected to the hollow cylindrical body and each bit compartment is provided with a hole adapted for receiving therein a bit. A lid is integrally formed with the bit compartment to cover a corresponding elongated hole. A controlling disk is rotatably connected to a side face of the hollow cylindrical body to control pivotal movement of the bit compartments so that rotation of the controlling disk is able to pivot the bit compartments relative to the hollow cylindrical body to reveal the bits received in the holes of the bit compartments.

Abstract: A screwdriver includes a hollow cylindrical body with multiple elongated holes defined in an outer periphery of the hollow cylindrical body to communicate with inside of the hollow cylindrical body. Bit compartments are provided to be pivotally connected to the hollow cylindrical body and each bit compartment is provided with a hole adapted for receiving therein a bit. A lid is integrally formed with the bit compartment to cover a corresponding elongated hole. A controlling disk is rotatably connected to a side face of the hollow cylindrical body to control pivotal movement of the bit compartments so that rotation of the controlling disk is able to pivot the bit compartments relative to the hollow cylindrical body to reveal the bits received in the holes of the bit compartments.

Abstract: A method for estimation of change in bone mineral density or a method for diagnosis of osteoporosis, comprising the step of measuring change in a concentration of soluble interleukin-6 receptor in a blood sample, by for example, sandwich assay or competition assay; and a kit for carrying out the methods, comprising: (1) an anti-sIL-6R antibody immobilized to a solid carrier, and (2) an anti-sIL-6R antibody bound to a detectable marker or capable of binding to a detectable marker.

Abstract: A method for estimation of change in bone mineral density or a method for diagnosis of osteoporosis, comprising the step of measuring change in a concentration of soluble interleukin-6 receptor in a blood sample, by for example, sandwich assay or competition assay; and a kit for carrying out said methods, comprising:(1) an anti-sIL-6R antibody immobilized to a solid carrier, and(2) an anti-sIL-6R antibody is bound to a detectable marker or capable of binding to a detectable marker.