Makita Impact Black Socket Adaptors let you use sockets in an impact driver or drill driver. The black coating is to prevent rusting and corrosion and so increasing durability for a longer life than that of standard bits. Specifications • Makita Part Number: B-66874 • Shank: 1/4" Hex • Square Drive: 1/2" • Length: 50mm Features & Benefits • Black coating to prevent rusting and corrosion • High durability with a longer life than standard bits • Impact rated meaning they are suitable for use in impact drivers • Works well with 25mm and 50mm Impact Black screw bits