Heat-treated for strength and durability. Includes: 3/8" x 3" extension bar; 3/8" -drive reversible ratchet handle; mini ratchet screwdriver handle; 3/8"-drive (F) x 1/4" (M) adapter; 3/8"-drive 13/16" spark plug socket; 1/4"-drive adapter; 6 precision screwdrivers, sizes 1", 1.4", 1.8", 2.4", #0 x 3", #1 x 3.5"; 6" long nose pliers; 6" slip joint pliers; utility knife; 10 utility knife blades; eighteen 1/4"-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" standard sizes; 12 3/8"-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" standard sizes; 21 hex key wrenches with two holders in 0.5, 1.5, 2, 2.5, 3, 4, 5, 5.5 and 6mm sizes and 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16 and 3/8"; twenty-one 1" bits with two holders in Phillips (sizes #0, #1, #2, #3), Star (T10, T15, T20, T25, T30), Hex (1/8, 5/32, 3/16, 1/4"), Pozi (S1, S2, S3) and slotted (1/8, 3/16, 1/4, 9/32"); 8" magnetic torpedo level; 8-oz. tubular handle claw hammer; 1/2" x 12" tape measure; 3/4" x 30' UL certification electrical PVC tape; sixty-six 1" bits with two holders and two magnetic extension holders for each type (Phillips, three each: #0, #1, #2, #3; slotted, two each: 1/8, 5/32, 3/16, 1/4, 9/32"; Star, two each: T10, T15, T20, T25, T27, T30, T40; Hex, two each: 1/8, 5/32, 3/16, 7/32, 1/4", 2.5, 3, 4, 5, 6mm; Pozi, two each: S0, S1, S2, S3); 6" wire stripper tool; thirty 3 x 120mm cable ties; blow-molded storage/carrying case.