Plug into Safety with Leviton’s Line of Tamper-Resistant TR Receptacles. As a long-time manufacturer of tamper-resistant devices, we are pleased to be at the forefront of this safety measure with an expanded product line that encompasses a wide range of TR devices in Residential, Commercial, Industrial and Hospital Grades. Additionally, we have redesigned the core devices to improve the overall performance of our full line all to ensure that not only do you have more choices, but smarter choices.Ultrasonically welded and riveted for robust assembly securityShutter mechanism inside the receptacle blocks access to the contacts unless a 2-prong plug is inserted, helping ensure hairpins, keys, etc. will be locked outReceptacles meet 2011 NEC requirements for dwelling units 406.12, guest rooms 406.13 and child care facilities 406.14Impact-resistant thermoplastic construction