Comprehensive Sizes: Includes all essential drivers (4-13/16", 5-11/16", 5-31/32", 6", 6-5/16") plus handle extension for deep brake drum applications -fits 4-13/16" to 6-5/16" hubs，Specially designed to securely hold and position hub seals for precise Heavy-Duty Sturdiness: The Hub Seal Installer Kit is made of high-hardness aluminum alloy. Thickened disc sleeves withstand heavy blows from hammers or chisels. for rust & wear resistance and durability Thickened Steel Handle: Our bearing seal driver kit features a long and thickened handle that effectively transmits impact force without deformation. The handle has slip-resistant patterns for a secure grip that won’t loosen Fits Most Class 7 & 8 Trucks - Compatible with multiple types of trucks and trailers including Freightliner, Peterbilt, Kenworth, and International models Easy Storage with Toolbox: To solve tool storage issues, our seal driver kit provides a high-toughness, waterproof plastic box with internal size markings. It allows orderly storage and clear identification, ensuring reliable storage and portability