You are looking at a kit of refrigeration service tools: for service valves, one valve core remover/installer/changer, and one combination of 4-sizes square wrench, plus a pack of 10 valve cores FEATURES: Improved Model: Valve Core Remover/Installer You can remove valve cores quickly and easily. work on service valves cores in Schrader ports booth 1/4 " and 5/16" in charged systems, change the core without loosing the charge! solid brass with SS ball valve to isolate the charge when the core is removed. with a Side 1/4" flair port for checking if the job done correctlyRatchet Wrench: Four sizes in one: 1/4", 3/16", 5/16", and 3/8" for square heated valve stems/system ports: Same size and usage as Yellowjecket item #60613. for HVAC services. A Pack of 10 Schrader Valve core replacements included: Compatible for All refrigeration systems, R410a included, to replace the leaking/damaged valve cores. Please see each item for details if needed in their category.all together for the low price, buy it now for only $44.77 please take a look at the other listings in my eCRATER store, or more information and buy it now available at https://www.viot.us WE SUPPLY HVAC SCHOOLS AND CONTRACTORS! Track Page Views With Auctiva's FREE Counter Every buyer gets a MyStoreRewards invitation for cash back Add a map to your own listings. FREE Trial! Track Page Views WithAuctiva's FREE Counter