For the machinists and lathe operators out there, this Aloris AXA-4D is a top-quality boring bar holder for your quick-change tool post. Aloris is a famous name for a reason – their tooling is built to last and perform. This holder has a precision-ground bore and a split-clamp design that gives you excellent, even clamping pressure on your boring bar. A really useful feature is the ability to adjust the cutting angle of your bar from positive to negative to get the perfect setup for your job. This is for the AXA size tool post (common for smaller to mid-size lathes). Please note: the bushings for different bar sizes are sold separately. It's made in the USA and is a professional-grade addition to your shop that ensures accuracy and rigidity for your boring operations. If you demand precision, this is the holder you want.