Description "Tough-Cut" octagonal boron-carbide shackle. "Rust-Oleum" protection; no rust. Dual ball bearing locking for maximum pry resistance. "Dual-Armor" construction: laminated steel core with weather-resistant cover that protects against snow, rain, dirt, mud, grime, and salt. Covered keyway and shackle seal. 2" wide case, 3/8" shackle diameter, and 30/32" horizontal shackle clearance.