Sealey NS054 Socket 21mm 1/2"Sq Drive - Non-Sparking WallDrive Manufactured from Beryllium Copper. Die forged. WallDrive socket configuration. NS054 Features One of a comprehensive range of Premier Non-Sparking Safety Tools, suitable for daily professional use Manufactured from Beryllium Copper Die forged WallDrive socket configuration Lifetime guarantee* NS054 Specification Model No NS054 Brand: Premier Depth: Standard Drive: 1/2"Sq Material: Beryllium Copper Nett Weight: 0.130kg Size: 21mm What is included: 1 x Sealey NS054 Socket 21mm 1/2"Sq Drive - Non-Sparking WallDrive