Lathing 250-401 Holder 14 – 20 Inch CNC Lathe BXA Wedge Quick Change Tool Post. 12 in L x 12 in W x 6 in H Rough Estimation. 50 Pounds Rough Estimation. Lathe Swing: 14 – 20 Inch. Hex Key Size: 1/4 Inch. Tool Post and Tool Holders No. 250-401 Turning Tool Holder, Use Tool Bit 1/2 Inch To 1 Inch. 250-402 Boring, Turning Tool Holder, Use Tool Bit Up To 1 Inch And Round Shank. Boring Bars Up To 13/16 Inch. 250-404 Heavy Duty Boring Bar Holder, Can Use Both 1 nch And 1-1/4 Inch Shank Boring Bars. 250-407 Parting Blade Tool Holder, Use 7/8 Inch High Parting Blades. 250-410 Knurling And Turning Tool Holder, Use Short Tool Bit 1/2 Inch To 1 Inch. Holders Insure Smoother Turning Without Chatter Or Vibration. Rigid Wedge Design, Easily Centered. Precision-Engineered To Assure Repetitive Accuracy Quickly And Easily Installed On An Engine, Bench, Or Turret Lathe For A Wide Range Of Operations.