The Stereo Tool Kit includes all the tools you'll need to install your car stereo like a pro. Designed by pro installers, it includes all the tools they use, so you'll end up with a clean, professional installation every time. And when you're done installing, the convenient package is designed to allow you to store your tools. It combines wire cutter, stripper and crimper tool, magnetic screwdriver with 8 different bits, #2 and #3 Phillips, #3 and #5 flat, T15, 7mm, 8mm and 10mm nut drivers, dual polarity test light that indicates both positive 12 volts ( ) and negative ground (-), door panel popper and interior trim removal tool, RCA cable puller tool, 20 butt connectors, 6 cable ties and 1 roll of electrical tape.