Leviton X7899-FW 20 Amp, NAFTA, ARRA, Tamper Resistant, SmartLock Pro Slim GFCI, Screws, Self-Grounding Wallplate, White Slim, Shallow Design - Reduced depth makes it easier to install in any electrical box, even shallow ones Provides up to 25 percent or more space in the wall box vs. other GFCIs Tamper-Resistant - Shutter mechanism inside the receptacle blocks access to the contacts unless a two-prong plug is inserted, helping ensure hairpins, keys, etc., will be locked out Automatically tests the GFCI every time the RESET button is pushed in. The GFCI will not reset if its circuit is not functioning properly Withstands high torque and resists wire pullout