Material of storage case: Heavy gauge steel which is durable and can withstand impact force 
Material of tools: Chrome vanadium steel 
Added durability and long-lasting use 
Contains the following: 
1/2" Dr 6pt socket - 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 30, 32 mm
1x Ratchet Handle - 250 mm
2x Extension bars - 75, 250 mm
1x Sliding T-handle - 250 mm
1x Universal Joint - 72 mm