Razors FSK Aluminium Buckles.
Sold as set.
This is the buckle that sits on the top of your skates and is mounted on the cuff.
They always have 2 mounting bolts (15mm apart) on the outside of the skate, and one mounting bolt on the inside of the skate for the buckle receptor. That means in total there are 3 holes. Buckles that are mounted like this are called SBM3 which stands for Standard Buckle Mount with a total of 3 bolts
Top buckles can vary in length but are also easy to cut to the right size.