Shimano Chainring Tool. 9 & 10mm spanner also.
Shimano 105 Chainring 50t 110bcd Silver New Old Stock 5 Bolt
Stronglight Chainring Bolt 5 Piece Screw Set M8 x 0.75mm Fits Shimano Ultg/Dura
SRAM Chainring Bolt Kit 5 Arm for Red 2013 (Hidden Bolt), 11.6918.000.001 - Aluminium Black
Park Tool CNW-2 Chainring Nut Wrench - Peg Spanner for Chainring Bolt
Wolf Tooth Chainring Bolt Kit 4 Units 6 mm
Chainring Bolt Spacers 1/2/3mm Bike Washers Crankset MTB Set
