A template device including an extendable base having a first part and a second part that are extendable along the device's longitudinal axis. A first swivel is appropriately attached to the first part, and a second swivel is appropriately attached to the second part such that the first swivel and second swivels are disposed on opposite ends of the base. The second part includes a slot having a width sized for frictionally receiving a stud member that extends from the first part, the slot sized and shaped for allowing the stud member to slide along the length of the slot.