PREMIUM BEARING PULLER : Bearing puller kit is built with rugged drop-forged construction and made of heat-treated high hardness red steel, for ultra strength. Blind bearing puller kit coated with black oxide finish ensures corrosion resistance and long-term durability, easy disassembly of stubborn bearings. Specificities: High-quality manufacturing: The upgraded collets and columns are made of high-hardness red steel, which is more durable than traditional ones. Other accessories are forged from high-quality chromium vanadium steel. After heat treatment, features high hardness, high toughness, and not easy to rust. Notes: .