Mechanics Pro Vise 4-1/2" Precision round slide bar – eliminates movement in the front jaw regardless of opened distance. Enclosed spindle – keeps lubricants in and contaminants out for smooth operation. Thrust bearing – easier to apply & release greater clamping force. Ductile iron movable jaw & base – greater durability with lighter weight premium material. Large anvil work surface – accommodates a wide range of striking needs. 360° swivel base with double lockdowns – easy and secure access while in use 28810 Yes - LEAD