Abstract: An apparatus is provided for locking and unlocking a camper shell from the inside. The device can be purchased as an inexpensive after market part and easily and quickly installed without the need for expensive tooling. The device includes a handle having proximal and distal ends and fashioned with a lateral bore at its proximal end for connecting with a torsion bar already existing on the latching mechanism of the camper shell. The distal end of the handle includes a cam, pivotally connected thereto, which can move between a position which in which the cam is generally flush with the handle and other positions in which the cam extends laterally from the handle. A cam lock is provided to engage the cam and hold it in one or more selected positions, the positions providing corresponding amounts of lateral extension from the handle. The when extended, the cam prevents the handle from being turned, thereby preventing the camper shell from being opened.