Whether you're a DIYer or professional, this 300-piece Performax® mechanic's tool kit includes everything you need to tackle any project in handy tool chest ready foam organizers! It includes 14 combination wrenches, 61 shallow sockets, 28 deep sockets, 28 bit sockets, 40 hex keys, 99 insert drive bits, one 1/4-inch socket adapter, 18 nut drivers, 3 ratchets, 4 extension bars, a coupler, one 3/8-inch by 1/4-inch adapter, a spark plug socket, and one 1/4-inch bit driver.