The quad-16 deep well impact flip socket set combines 16 SAE and metric hex sizes in 4 convenient color coded sockets. Small 1/4 in to 7/16 in, medium 1/2 in to 11/16 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, these quad sockets are a compact and convenient solution for any job.