9pc internal hexagonal strong socket wrench 14pc hexagonal handle screw extension rod pneumatic screwdriver insert tool set

Material: Tool steel 40CR

14PC specifications: 3/16 (4.76mm), 1/4 (6.35mm), 9/32 (7.14mm), 5/16 (7.93mm), 11/32 (8.73mm), 3/8 (9.53mm), 7/16 (11.11mm) 5mm, 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm

9PC specification: 5mm-13mm