B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
B25B15/00—Screwdrivers
B25B15/001—Screwdrivers characterised by material or shape of the tool bit
B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C25/00—Profiling tools for metal extruding
B21C25/02—Dies
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
Matrice segmentee, notamment pour le matricage des metaux, procede de fabrication d'une telle matrice et procede de fabrication d'un chapeau de tete de bielle comportant utilisation d'une telle matrice
Procede de fabrication d'une piece de boulonnerie, outil pour la mise en oeuvre du procede, dispositif de vissage et de devissage d'une telle piece de boulonnerie