UFO T-slot Cutter - 3T 3TS Milling Cutters

I don't understand how the arbor helps If you're going straight down, won't the arbor collide with the walls of the slot you're cutting?

Indexable Chamfer Milling Cutters · HSS Milling Cutters · All HSS Milling T-Slot End Mills - 4TESC; 3mm 4 Flute T-Slot Cutter 3mm 4 Flute T-Slot Cutter

indexable t slot milling cutter 4 cutting edges per indexable insert; For machining radial grooves and T-slots in machine beds; With internal coolant for reliable chip evacuation by

indexable t slot cutter Indexable, Solid, Both SASG Side cutter for thin slitting and cutting off ASV Axial drive type slot milling cutter with tangentially mounted inserts HSV-M