Problem Solvers Chainring Steel Inner Bolt 12.5mm Set of 5
Stainless Steel, hex type. 12.5mm in length.
Inner bolts are used to attach a single chainring to the “granny gear” position of a triple crankset. No nuts are needed.
You may need to use the granny gear spacers from your old crankset to get the correct spacing on the new granny gear.