PROWHEEL Bike Hex Crank Arm Fixing Bolts Spindle 8mm Allen Key Bolt Screws Capless Bottom Bracket for Cycling Bicycle Axle Fits Many Bike Cranksets

8mm Hex Crank Arm Fixing Bolt and Cap replace the old bolts for your crank. Uses an 8mm hex wrench. Please note: If your crank arm is ovalized and keeps falling off. Replacing the bolt with keep the crank arm attached for a while but will eventually fall off. If this happens you will need a new crank arm. When the square taper is ovalized from wear, it will back out the bolt M8 (8mm)thread, thread 18mm long, 20mm dia. end cap Package Contents: 2pcs Bolts Please note if your crank arm bolt is stripping, it is usually due to the bottom bracket axle threading and not the crank, in that case, you will need a new bottom bracket axle