The NAPA Carlyle R12S100 1/2" Drive Swivel Ratchet & the R38LF120 3/8" Locking Flex Head Ratchet & the R14LF120 1/4" Locking Flex Head Ratchet are all three high-quality ratchets designed for mechanics. With a 100 tooth & 120 Tooth designs and a quick release feature, these ratchets offer durability and convenience. The lifetime warranty ensures long-lasting performance, making it a reliable choice for mechanics and DIY enthusiasts alike.This High-Quality ratchet set is a must-have in any toolbox.