Abstract: A bit holder comprises a shank, a sleeve placed over the shank, and an adjusting sleeve coupled to the sleeve. The shank has a combination part for incorporating with a hand tool, a C-shaped retaining groove for engaging with a C-shaped buckle, and a combination groove for holding a bit. The sleeve has an inner ring with a gap for assorting with a locking bulge on the shank and a position bead hole on its outer threading for accommodating a position bead. The adjusting sleeve with an inner threading for locking the outer threading of the sleeve has a long groove on its inner wall and, by using this long concaved groove to assort with the position bead, the locking position between the adjusting sleeve and the sleeve can be adjusted.

Abstract: The present invention provides a kind of Clamed Structure of Bit comprising: a rod, on which a combination part was designed which can incorporate with hand tool; additionally, a C-shaped retaining groove was set particularly for C-shaped buckle, and a reversion locking bulge was designed particularly for pulling out screw; in addition, some plural locking bead holes and buckling bead holes were designed for buckling round beads and buckling beads respectively; and concaved pentagonal cover was designed for working with the adjusting sleeve with a certain locking depth; at last, a combination groove of bit was designed on the front of rod; and a sleeve, on which a perforation was designed for the said rod; and an inner ringy cover was set, which can hold one end of spring of the rod, among which some perforations were designed for assorting with the aforesaid locking bulge; additionally, an outer threading was designed for adjusting screw lock of sleeve; in addition, a position bead hole was designed on the o

Abstract: A tapping screw includes a head, a shank and a cutting member, Said the shank has male threads, and the cutting member extends down from the shank and has a plurality of cutting grooves lengthwise formed and/or a plurality of wings also lengthwise formed; an annular groove is further provided between the shank and the cutting groove for wood waste cut out of a drilled hole of an object to move out smoothly and quickly, so the sharpness of the cutting member and the pointed end may be kept usual, and resistance against drilling and fixing of the screw may be reduced.

Abstract: A screw band with washers includes a screw band having a plurality of screw holes for screws respectively provided with a washer in advance to be positioned therein. Each screw hole has a pinching surface and a plurality of connect ribs are provided between each pinching surface and the screw band. The screw band further has a plurality of tooth grooves formed in opposite lengthwise sides to be fitted in by a tool and enable the screw band moved forward. A washer is fitted around the shank of each screw, located just under the lower surface of the screw band to sandwich the screw band together with the head of each screw so as to keep each screw vertical to the screw band to enable the screw correctly driven in an object. The diameter of each washer may be larger or smaller than that of the head.

Abstract: A screw band with washers includes a screw band having a plurality of screw holes for screws respectively provided with a washer in advance to be positioned therein. Each screw hole has a pinching surface and a plurality of connect ribs are provided between each pinching surface and the screw band. The screw band further has a plurality of tooth grooves formed in opposite lengthwise sides to be fitted in by a tool and enable the screw band moved forward. A washer is fitted around the shank of each screw, located just under the lower surface of the screw band to sandwich the screw band together with the head of each screw so as to keep each screw vertical to the screw band to enable the screw correctly driven in an object.

Abstract: A tapping screw includes a head, a shank and a cutting member, Said the shank has male threads, and the cutting member extends down from the shank and has a plurality of cutting grooves lengthwise formed and/or a plurality of wings also lengthwise formed; an annular groove is further provided between the shank and the cutting groove for wood waste cut out of a drilled hole of an object to move out smoothly and quickly, so the sharpness of the cutting member and the pointed end may be kept usual, and resistance against drilling and fixing of the screw may be reduced.

Abstract: A tool combining rod includes a rod member, an engaging head member and an engage member. The rod member has a rear non-circular portion for combining with a driving tool, and a front combining hollow for combining with the engage head member and the engage member. The engage member has a center hole for the engage head member to fit through therein and an elastic annular wall to tightly fit in the combining hole of the rod member. The engage member has a larger diameter than or equal to the outer diameter of the rod member, and the outer diameter of the front combining hollow portion is smaller than or equal to that of the rear non-circular portion to convenience of combining with a screwdriver.

Abstract: A tool-combining rod includes a rod member, an engaging head member and an engage member. The rod member has a rear non-circular portion for combining with a driving tool, and a front combining hollow for combining with the engage head member and the engage member. The engage member has a center hole for the engage head member to fit through therein and an elastic annular wall to tightly fitting in the combining hole of the rod member. The engage member has a largest diameter smaller than or equal to the outer diameter of the rod member, and the outer diameter of the front combining hollow portion is smaller than or equal to that of the rear non-circular portion for convenience of combining with a screwdriver.

Abstract: A screw with a pointed end includes a head, a shank, and a conical end portion formed in a lower portion of the shank. The conical end portion has a drill thread and an incomplete securing thread. The drill thread extends upward from a pointed end of the conical end portion to an upper end of the conical end portion. The incomplete securing thread has its lower end connected to the drill thread so that cut waste may not be hampered by the incomplete securing thread when the screw begins to move into a wooden object and cut and drill a hole therein. Then cut waste may smoothly move out of the wooden object so as not to let it split or tear, with operating twisting force diminished and securing force enhanced.