Rust-Proof and Durable: Constructed from high-hardness steel with an anti-rust coating, our slide hammer puller withstands heavy use without deformation. Pins, U-shaped counterstay, and screw adapters undergo heat treatment for enhanced hardness High-Temperature Quenched Collets: Crafted from Cr40 steel with high-temperature quenching, our collects resist wear and deformation. The slide hammer kit withstands heavy hammer impacts and the working load between fastening bearings for durability Expandable Collets: With ten collects for various bearing sizes, our slide hammer set ensures a snug fit by allowing slight expansion via pin bolt tightening. It avoids loosening during sliding hammer operations, reducing the risk of failure Dual Operation Modes: This slide hammer bearing puller provides two removal methods: the sliding hammer and the U-shaped counterstay. Utilizes the 3.1 lbs sliding hammer for removal through inertia, while the counterstay is ideal for narrow spaces 16 PCS Bearing Removal Set: Our slide hammer puller set includes ten collects, three screw adapters, a sliding hammer kit, a U-shaped counterstay, and an M10 pin bolt. It detaches stuck parts ranging from 1/4 to 2-1/3 inches (6-59 mm) in size