Patent ID: 7175185

Claim:
A bit holder comprising: a shank, on which a combination part and a C-shaped retaining groove are formed, a C-shaped buckle for engaging with the C-shaped retaining groove, one side of the C-shaped buckle receiving a spring, a locking bulge provided on the shank, and a combination groove formed at one end of the shank for holding a bit one or more locking bead holes and one or more buckling bead holes being formed on the shank; and a sleeve for coupling the shank, the sleeve having an inner ring formed on an inner wall thereof which can hold one end of the spring and has a gap for assorting with the locking bulge, a concaved groove set on the inner wall of the sleeve for engaging with a locking bead received by the locking bead hole, an outer threading, and a position bead hole on the outer threading for accommodating a position bead; and an adjusting with an inner threading for locking the outer threading of the sleeve, a long concaved groove designed on an inner wall of the adjusting sleeve, wherein, using this long concaved groove to assort with the position bead, the locking position of the adjusting sleeve and the sleeve can be adjusted.