Safety coupling with push button system and connection for appropriate hose inner diameter; automatic pressure relief for safe separation without the dreaded "whip effect" when pulling off the nipple; by pressing the button, instant pressure relief in the line and the separation of the nipple in one process; meets the standards ISO ISO 4414 to protect the user, certified according to ATEX 2, European profile 7.2 - 7.4 mm, universal, anti-static, ergonomic design and ultra-light