AES Industries 2190 Door Spring Compressor Tool For GM Cars and Light Trucks SAFELY AND EASILY compresses the door hinge spring on GM (General Motors) cars and light trucks for quick removal and installation. DEEP REACH design will remove the door hinge spring from both GM (General Motors) B-body cars and light trucks. LESS HASSLE when removing dangerous and stubborn door hinge springs. SPRING COMPRESSION ROD can tightened and loosened with a 1/2" (Half Inch) wrench.