Muc Off, Tools, E-Bike Drivetrain Tool, precision machined 6061 aluminium case with screw cap, inner plypropylenee bit holder holds: 5mm, 6mm hex & T30 Torx bits, Rubber O-ring reduces water entry into bits, silicone sleeve protects bike crank when spinning backwards, corrosion resistant neodymium magnet locks tool bits in place, handy size you can take anywhere, allows easy cleaning, maintenance and lubrication of drivetrain, anodised finish in Muc-Off Pinkblack.