Keyless lower rolls and main drive shafts are available on several roll groovers, eliminating problem of damaged or lost keys, as well as removing need for lower rolls to be aligned with key. Portable Model VE272 FS easily mounts to company's and most standard power drives. For fabrication shop roll grooving, Model VE268 is equipped with pivot-arm design, facilitating roll changing without removing shafts. Field Model VE270 comes with integral motor, safety foot switch, and power plug.