This Shars tool holder (model 404-2438) is a right-hand, indexable turning tool holder designed for use with TNMG style carbide inserts. It has a 1/2\ shank size and a 4\ overall length, making it suitable for many lathe setups. The MTJN designation indicates the specific geometry and insert clamping style. Brand new and unused in its packaging, it's a cost-effective way to expand your machining capabilities or replace a worn holder. Using indexable inserts allows you to quickly change cutting edges without regrinding tools. Please note the California Prop 65 warning – this product contains lead, so handle appropriately. Ideal for machinists, metalworking hobbyists, or vocational workshops looking for reliable, precision tooling for turning operations on steel, aluminum, or other materials.