Ideal for your existing arsenal of tools, or as a great starter set, this Mechanic Tool Set is a large collection of 1/4 in. and 3/8 in. drive mechanic tools is packed into the CRAFTSMAN Portable Toolbox with 20.5 in. ball-bearing drawers. Drive Quick-Release Ratchets (CMMT81747 and CMMT81748) which provide users with an ideal balance between durability and accessibility. Take on your next project with this Full-Polish Chrome Mechanics Tool Set. Drive Ratchets produce a 5-degree src swing. Ideal balance between access and durability.