1、5PCS IN 1 SET: Including 5pcs lathe boring holders, with different specifications for different turning situations, with wrenches, convenient and durable. 2、METAL PROCESSING: CNC boring holders are commonly used for turning and finishing of steel, cast iron and non ferrous materials, with a wide application. 3、HIGH SPEED STEEL: Made of excellent high speed steel material with high hardness, low friction coefficient, good wear resistance and chemical stability. 4、EASY OPERATION: Boring tool holder with 95 degree cutting angle and right hand cutting direction for easy operation, ideal for lathe turning tools. 5、STABLE STRUCTURE: These CNC turning tools have simple structure and fastened with impact bolt, often used for small hole machining, safe and reliable.