Oversized aluminum barrel and steel piston with aluminum base. High volume, maximum flow design efficiently inflates large diameter tires and can quickly seat tubeless setups. Large 2.5" gauge optimized for low pressure fine-tuning. Extra long, high-strength oversized hose with aluminum couplers. Durable, anodized high-polish finish with varnished wood handle. High volume ABS2 equipped - an innovative chuck that quickly and securely clamps to presta or schrader valves and features the Air Bleed System button for easy pressure tuning. A quick release design allows for rapid disengagement.