This is a three-square needle file from BAHCO

Handle width: 36 mm

The product is presented on the manufacturer's website with specifications for blade and handle dimensions

Cleaning agents before curing: Zestron HC and other Zestron and Vigon products (avoid alcohol)

Function: Backstop list – prevents items from falling off the shelf

Adapter BNC XM-BB/4 sort Unit(s):Pcs This is a three-square needle. Two pole touch protected adapter with 4 mm connectors linked to the BNC system. Version with BNC male and rigid 4 mm sockets, accepting 4 mm plugs with rigid insulating sleeve. The contact pin of the inner conductor of the BNC connector is in gold plated brass.