Park Tool Self-extracting Crank Cap Tool BBT-16 drumbeat21-8 Th new design features a

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It's fully biodegradable and contains no solvents or harmful chemicals

It has many features usually only found in much more expensive jerseys such as mesh armpits and sewn in reflective detailing (no peeling off)

ample side visibility and IP-67 submerse-ability

- Chain Tool: 7-11 speed compatible

Park Tool Self-extracting Crank Cap Tool BBT-16 drumbeat21-8 Th new design features aThe BBT 16 removes and installs the self extracting one key release caps on SRAM and RaceFace cranks with a 16mm hex hole. Features investment cast steel construction and an option to use 8mm hex for better leverage.