Patent ID: 7452361

Claim:
A system comprising: a screwdriver having a tool shank and a tool element with at least two axially and radially extending tool blades, each tool blade having at least one elastic clamping section, said elastic clamping section being moveable from a first position to a second position, said tool element having a central shank core, said tool blades being formed by uniform cutouts of a rotationally symmetrical blade shank, said cutouts having a triangular cross section, said tool blades being connected with one another in one piece via said central shank core, one tool blade being connected with another tool blade in one piece via said central shank core, each tool blade having a front surface extending along a cross section of said tool shank in a direction substantially perpendicular to a longitudinal axis of said tool shank, said tool blades having separating slots, each tool blade being elastic in a circumferential direction via said separating slots; and a bone screw with groove-like blade slots, each tool blade engaging each groove-like slot such that said bone screw moves said clamping section from said first position to said second position when said bone screw is connected to said tool element, whereby said clamping section clampingly engages said bone screw in said second position.