DescriptionAre you looking for a professional, yet affordable electric wrench changeover head? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional electric wrench changeover head must meet your needs. It is one of the best choices for you.Features-Color: Black -Material: Steel -Packing Size: 8.00X6.00X6.00cm/3.14X2.36X2.36in -Made of high grade steel material, practical and durable in use. -The steel ball design on the elastic sleeve adapter can clamp the bit and prevent it from falling off.-The telescopic conversion headband has self-locking function, which is more firmly clamped. -The adapter is suitable for all kinds of electric spanners and 1 / 2 pneumatic spanners. -It is easy to install and practical to use, lightweight for easy carrying outside.