Trade Catalogs on Hot and Cold Swaging Machines ; Hammering Machines ; Sensitive Drills ; Multiple Spindle Drilling and Tapping Machines ; Multiple Spindle Attachable Drill Heads ; Automatic Drilling and Tapping Units ; Automatic Thread Rollers ; Jigs ; Fixtures and Tools ; Contract Machine Work ; Die Polishing Machines ; "super-spacer" Spacing Devices ; Gears ; Cams ; V-block Milling Fixtures ; "four-point" Milling Vises ; Machine Components for Drilling, Tapping, Reaming, Spotfacing, Centering, Milling, Chamfering, Countersinking ; Hydraulic Drills ; Hydraulic Feed Units ; Automatic Cam Feed Drill Units ; Bench Taper Gage ; and Chucks