Heat-treated for strength and durability. Includes: 3/8-Inch x 3-Inch extension bar; 3/8-Inch -drive reversible ratchet handle; mini ratchet screwdriver handle; 3/8-Inch-drive (F) x 1/4-Inch (M) adapter; 3/8-Inch-drive 13/16-Inch spark plug socket; 1/4-Inch-drive adapter; 6 precision screwdrivers, sizes 1-Inch, 1.4-Inch, 1.8-Inch, 2.4-Inch, #0 x 3-Inch, #1 x 3.5-Inch; 6-Inch long nose pliers; 6-Inch slip joint pliers; utility knife; 10 utility knife blades; eighteen 1/4-Inch-drive hardened carbon steel sockets in 5, 6, 7, 8, 9, 10, 11, 12 and 13mm metric sizes and 3/16, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 15/32 and 1/2-Inch standard sizes; 12 3/8-Inch-drive 12-pt. carbon steel sockets in 11, 12, 13, 14, 17 and 19mm metric sizes and 7/16, 1/2, 9/16, 5/8, 11/16 and 3/4-Inch standard sizes; 21 hex key wrenches with two holders in metric and standard; twenty-one 1-Inch bits with two holders in Phillips, Star, Ponzi and slotted sizes; 8-Inch magnetic torpedo level; 8-oz. tubular handle claw hammer; 12-Inch tape measure; 3/4-Inch x 30-Feet UL certification electrical PVC tape; sixty-six 1-Inch bits with two holders and two magnetic extension holders for each type (Phillips, Star, Hex, Ponzi); 6-Inch wire stripper tool; thirty 3 x 120mm cable ties; molded storage/carrying case..