It's a combination of all the advantages of traditional free weights with all the advantages of a self-spotting machine. It's superior to a free weight machine because it's safer for muscles and joints and can be used without a spotter.
Smooth operation is the key.
Utilizing a double circuit linear motion ball bearing system, the load is supported by several lines of balls inside return circuits which infinitely circulate from one side of the retainer to the other. This reduces friction resistance, consumes less energy and attaining a far lower starting friction level than all other conventional bearings. Ultra sonically tested, recirculating ball bearings offer smooth, straight-line accuracy with exceptional load capacity. It's a powerful, yet affordable Smith Machine system for total body workouts. This precision crafted machine gives you every tool you need to build muscle, strength and endurance.