Model 120 Lathe Toolholders Features include: Change toolholder style by changing out the cartridge only Change from negative inserts to positive by changing out the cartridge only Cartridges hold all insert materials: Carbide, Ceramic, CBN and/or PCD Less time required than for changing toolholders Benefits include: Reduce machine downtime by 75% on toolholder changes Reduce your toolholder inventory Save money – crashed tools recovery generaly involves only the cartridge   Hand Style Holder Description PRNR-120 Right R Cartridge Holder 4" OAL 3/4" Sq, Right Hand PRNL-120 Left R Cartridge Holder 4" OAL 3/4" Sq, Left Hand Accessories         Std Ctg No IC Size & Thickness Insert Shape Clamp No Screw No 120250Ra 1/4" x 1/8" Round C-12 C12-25/75 120250Rb 1/4" x 3/16" Round C-12 C12-25/75 120312Ra 5/16" x 1/8" Round C-12 C12-25/75 120312Rb 5/16" x 3/16" Round C-12 C12-25/75 120375Ra 3/8" x 1/8" Round C-12 C12-25/75 120325RPa 5/16" x 1/8" Round/Pos. C-12 C12-25/75 120375RPa 3/8" x 1/8" Round/Pos. C-12 C12-25/75 120375Rb 3/8" x 3/16" Round C-12 C12-25/75 120312Ta 5/16" x 1/8" Triangle C-12 C12-25/75 120312Tb 5/16" x 3/16" Triangle C-12 C12-25/75 120375Ta 3/8" x 1/8" Triangle C-12 C12-25/75 120375Tb 3/8" x 3/16" Triangle C-12 C12-25/75 120315TPa 5/16" x 1/8" Triangle/Pos. C-12 C12-25/75 120375TPa 3/8" x 1/8" Insert TCMT-3 (2.5) 2 Insert Triangle/Pos. C-12 C12-25/75 120375TC 3/8" x 2.5 MM TCMT-3 (2.5) 2 Insert Triangle/Pos. C-12 C12-25/75 120312Wa 3/8" x 1/8" Trigon C-12 C12-25/75 120312Wb 3/8" x 3/16" Trigon C-12 C12-25/75