Compatible with most standard cars and sports bicycles. This is a set of two taps for threading the pedal mounting screws. It's a set of 9/16 inch right and left taps. Please understand that I will not negotiate a price reduction for this item alone. I will consider discounts for bulk purchases or combined purchases with other items, so please comment. Please purchase without commenting unless you are in a hurry. (Shipping may be delayed by more than a week due to long holidays or business trips. If you are short on time, please be sure to contact me in advance to confirm the delivery date.)