Stainless steel locking ball ensures secure fit. sockets snap on tightly won't slip off.<br>1/4" (6.35mm) hex shank prevents stripping during high speed drill operation.<br>Super strong heat treated chrome vanadium steel for normal impact.<br>Use sandblasted finish.<br>Applies to the screwdriver handle or electric screwdriver tools (hexagonal hole or three jaw chuck can be).<br>Driven sleeve is used, can be the original hexagonal side after installation on size into square size, which can be used for the installation of the sleeve, is a good accessories to convert.<br> Size: <br>1/4"*1/4"*50mm(Length) 1/4 "shank can be converted into 6.35 mm square<br>3/8"*1/4"*50mm(Length) 1/4 "shank can be converted into 9.53 mm square<br>1/2"*1/4"*52mm(Length) 1/4 "shank can be converted into 12.7 mm square<br>Material: Chrome vanadium steel CR V. <br>Package List:<br>Socket Adapter Hex Shank Set(Include 3pcs)