Insertion tool for co-operation with a dental implant, said implant having at least one anti-rotation surface, the insertion tool extending along a longitudinal axis and having at its distal end a resilient sleeve, said sleeve having at least one torque transmission surface and being adjustable between a first, rest position, and a second, stressed position, wherein the location of the at least one torque transmission surface is different in the first and second positions, the insertion tool further including an actuation means arranged to selectively engage with the sleeve in order to adjust the sleeve between the first and second positions, the tool being arranged such that, in use, adjustment of the sleeve from the first to second position enables a better contact between the at least one anti-rotation surface and the at least one torque transmission surface.
