This is WYNNsky 1/4" NPT 2 Way Air Hose Splitter Connector, it comes with 1 piece 1/4" NPT inlet with 2 pieces 1/4" NPT outlets, which allows connection of 2 tools to a single outlet, and the 360° swivel design reduces kinks when working.

WYNNsky 2 Way Air Hose Splitter 1/4" NPT Compressor Swivel 360 Degrees Connector