Pull Studs | VERTEX Company is one of provided Pull Studs VERTEX like BT-510 VERTEX and BT-529 VERTEX Pull Studs so if you want to clamp Collet VERTEX on Milling machine or CNC Milling Machine you should use Pull Studs VERTEX Moarref Tools company as VERTEX distributor Iran sell all Pull Studs VERTEX if you want to know about different between pull Studs VERTEX and other you should know VERTEX company use SNCM21 for Materials with HRC54 hardness you can use Pull Studs M12 and Pull Studs M16 and Pull Studs M24 VERTEX PULL STUDS