The listing is for an Andel crankset suitable for track fixed wheel bikes or single speed. The design is similar to the fluted crank design popular in the 60's 70's and early 80's. However these are a new product. They are also light weight at around 650g.
The BCD of the chainring is 144mm and will take 1/8" chains only. The cranks are for a JIS square taper axle of length 110mm. A Shimano UN55 or Tange Seiki bottom bracket would be perfect.
This is a high end crankset without the cost of the Shimano Dura ace or Campagnolo.
Crank fixing bolts supplied.