Tub box spanner set a 12 pc mm

• 6-point Dynamic-Drive™ profile provides longer life for screws and nuts
• With hole to locate stud
• Chrome plated micro-matte finishing provides high quality surface
• High-performance alloy steel
• Hardness: 42 HRC to 48 HRC
• Sizes marked with * are hollow along the shank
• Standard: UNE 16586
• Available in cardboard box
• SB: retail pack on a plastic info card