Abstract: A downhole equipment for use in the gas and oil drilling industry includes a first elongate member arranged in telescopic relation with a second elongate member, the elongate members being moveable relative to one another between a retracted position in which at least one tooth provided on the first elongate member is engaged with at least one tooth provided on the second elongate member so as to prevent relative rotation therebetween, and an extended position in which the at least one tooth of the second elongate member so as to permit relative rotation between the elongate members and in which abutment surfaces of the elongate members are in mechanical communication with each other so as to prevent further extending telescopic movement, Thus, the apparatus may be located between a spear and rotary easing cutter for setting the spear and for holding a casing and cutting string in tension while the casing is severed.