Patent ID: 7530770

Claim:
A door lockset mounting tool comprising: a base body having a first plate member, a second plate member fixedly vertically connected to said first plate member; a first positioning hole defined in said first plate member, and a second positioning hole defined in said second plate member; a positioning mechanism movably mounted in said first positioning hole of said base body for defining a first drilling center; and a positioning device mounted in said second positioning hole for defining a second drilling center; wherein said positioning mechanism comprises a first positioning ring mounted in said first positioning hole of said base body, and a second positioning ring sleeved onto said first positioning hole, said first positioning ring and said second positioning ring being respectively rotatable and slidable in said first positioning hole; wherein said positioning mechanism further comprises a first spring member for returning said first positioning ring each time said first positioning ring is moved relative to said first positioning hole of said base body, said first spring member having a first end fastened to said first plate member of said base body and a second end connected to said first positioning ring, and a second spring member for returning said second positioning ring each time said second positioning ring is moved relative to said first positioning hole of said base body, said second spring member having a first end fastened to said first plate member of said base body and a second end connected to said second positioning ring.