1、OXIDANT RESISTANT STEEL: Drill chuck arbor is made of excellent manganese steel material, surface quenching blackening treatment, possess high oxidation resistance, high hardness, long service life 2、EASY REMOVAL: Drill chuck mandrel allows quick and easy installation and removal, saving you time when switching between applications 3、WIDE APPLICATION: This high accuracy drill chuck mandrel is widely used in tapping machine, drilling machine, milling machine, boring machine, pneumatic tools, etc. 4、THREAD SPECIFICATION: This drill chuck arbor is a 3MT shank to 1/2in‑20 threaded hardened morse taper MT3 adapter, useful and practical 5、EXCELLENT PERFORMANCE: Drill chuck arbor adapter is made with fine workmanship, possess compact appearance and stable performance, can make sure durability and stability