Copper spindle + magnetic v-pad base + Anti-tipping bolt Pinpoint holding provides maximum clearance for tack welds. Brass contacts are ideal for stainless steel jobs. New copper spindle (deluxe model only). Adjustable v-pad base adapts to: round, square, flat, and angled surfaces. Anti-tipping bolt (deluxe model) Provides stability., Weight: 10.7806046118 Pounds, Manufacturer: Strong Hand Tools