The Quad Lock Case for iPhone 6. Constructed from a tough Polycarbonate core with a durable TPU outer, the Quad Lock Case is built to stand up to every day use and abuse while always looking and performing at its best. The soft TPU material makes it easy to install and remove your case and offers great impact protection. All of the cases Quad Lock produce are compatible across their whole range of mounts and accessories. This is a genuine Quad Lock Mount and is ideal if you have damaged or lost your case.