The 252-Piece STMT72645 Stanley Mechanics Tool Set contains all the pieces you need for basic car maintenance. The chrome vanadium-forged construction provides torque, strength and durability. The Stanley tool set comes with a durable carry case for storage and mobility. The set includes a 3/8" drive extension bar, 3/8" drive sockets, 3/8" drive deep sockets, 1/4" drive specialty bits, 38 hex keys, a 3/8" drive pear head ratchet and more. The knurled handle finish adds to the ease of carrying the set and increases its slip resistance.