The quad-4 deep well impact flip socket combines 4 SAE hex sizes in 1 color-coded socket. Access 1/4 in and 3/8 in hex sizes, then flip to use 5/16 in and 7/16 in. The spring-loaded action allows for hands-free size changes by applying pressure to the smaller socket to compress it out of the way. Compatible with Klein Tools 1/4 in hex flip socket impact shaft, this quad socket is a compact and convenient solution for any job.