Leviton T5320-W 15 Amp, 125 Volt, Tamper Resistant, Duplex Receptacle, Residential Grade, Grounding, White (4 Pack) 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 TR symbol on residential receptacles assures they meet the 2008 NEC requirement Ultrasonic heavy-duty construction offers long, trouble-free service life Heavy-gauge, rust-resistant steel mounting strap Shallow design for maximum wiring room