9 tamper-proof torx® blacked offset keys set t10-t50 454-9-h. includes 9 keys for tamperable torx® screws with security pin. measures: tr10, tr15, tr20, tr25, tr27, tr30, tr40, tr45 and tr50. long key. the long claw provides a greater transmission of the tightening torque and more accessibility. oxidized finish treatment provides excellent surface protection, greater precision at the tip. high quality steel, fully tempered. the size is laser engraved on the stick for easy identification. industrial packaging.