Patent ID: 7028589

Claim:
A power tool having a body, an extension extending from a side of the body and an axle extending from a side of the extension and divided into a fixing portion having a first diameter and a connection portion having a second diameter smaller than the first diameter, the connection portion being divided into a driving end and a peripheral edge formed on a distal edge of the driving end, wherein: an annular recess is defined in the peripheral edge to receive therein a resilient loop having a diameter such that while the resilient loop is received in the annular recess, a portion of the resilient loop protrudes outward from the annular recess; a slot is defined in a side face defining the peripheral edge; and a hole is defined in communication between the slot and the annular recess so as to movably receive therein a ball such that engagement between the resilient loop and a first auxiliary tool mounted outside the driving end may be secured by engagement of the resilient loop to an inner face of the first auxiliary tool and engagement between the ball and a second auxiliary tool extendable into the slot may be secured by engagement of the ball to an outer periphery of the second auxiliary tool.