What is the difference between a single and a double Barrell softball bat Barrell from a performance standpoint

STEEL RAW 2008 DeMarini Slowpitch Bat – DXRAW. I am looking for the quality of this bat and is a unique Barrell and am waiting to see if one is worth saving or should have a double?

slow-pitch for one barrel will be good ………………………

demarini RAW STEEL – www.kellysultimatesports.com – 888-448-2919

Wilson DeMarini Steel (34) (EA) This is truly a one-of-a-kind softball bat for the slow pitch market today. The bat is the first bat to contain a barrel made of steel. By doing so, this allows Demarini to produce a very durable, top-performing single wall bat that combines a composite handle with a Steel 01 Singlewall barrel. The Half & Half system redistributes weight for optimal balance, allowing players to swing faster with l…

DeMarini Steel Slow Pitch Softball Bat C6 Composite Handle with wider composite weave, maximizing handle performance with optimum flex. Steel 01 Singlewall Barrel utilizes inherent strength and weight of material for the pinnacle of single wall performance. N2M End-Cap is scientifically tuned to absorb vibration while maximizing power. Positack 2 Grip. 2 1/4″ barrel. Meets 1.20 BPF bat standard. Approved for play in ASA, USSSA, NSA and…

DeMarini WTDXWHI Steel Slow Pitch Softball Bat – New for 2010!! $257.04 C6 Composite handle Steel 01 Singlewall barrel N2M end cap Meets 1.20 BPF Bat Standard ASA,USSSA,NSA & ISA approved…