Comparison : Item # BB-41485, Case Hardened, Zinc Plate (Inch)
Item # BB-41486, Case Hardened, Zinc Plate (Inch)
Item # BB-41487, Case Hardened, Zinc Plate (Inch)
Item # BB-41488, Case Hardened, Zinc Plate (Inch)
Item # BB-41489, Case Hardened, Zinc Plate (Inch)