fig3 one of the drive slips 12 is illustrated in perspective view and enlarged from the fig1 and 2 views in the fig3 view there is visible interlocking members provided in each of the slips in order to keep them engaged as a single unit while simultaneously allowing them to slide relative to each other each one of the slips includes a keyed flange 26 which in the embodiment illustrated is of l shape but may be of any shape that allows sliding motion while inhibiting disassociation of each slip from its neighboring slip on an opposite side of slip 12 is a complementary flange keyhole 28 one end of which is visible it will be understood that the flange keyhole 28 extends the length of slip 12 as does keyed flange 26 if one were to obtain an opposing slip i e slip 14 one would notice that the keyed flange 26 and the flange keyhole 28 can be engaged as the slips 12 and 14 slid axially relative to one another sliding movement is thus enabled while lateral disassociation is prevented or at least inhibited it should also be noted in passing that an angle of the mating surfaces 30 on each slip 12 and 14 is dictated by a radius extending from the axis of system 10 this angle ensures smooth and distributed contact along each face 30 to improve overall efficiency and strength of system 10 still referring to fig3 drive slips 12 of the current disclosure possess.