Auto-rotating mechanism provides quick, uniform expansions Fastest 3/8 in. -1 in. expansions for up to 35% faster connections ProPEX expander heads with RAPID SEAL for up to 65% faster sealing at 45 degree Quick cam mechanism for fast, continuous expansion Built-in auto rotate mechanism for effortless, one-handed use Compact, right angle design for use in tight locations All-metal gears and integrated magnesium frame for maximum jobsite durability Extended dual actuating trigger for easy reach in confined spaces LED work light illuminates work space in dark locations Battery fuel gauge displays remaining run-time