This Armeg 3 Piece Twister Tray & Channel Socket Installation Set (Model: TWT&C3PCSET) is designed for efficient socket installation in channels. The set includes a 17mm Twister Channel Socket, a 19mm Twister Channel Socket, and a 100mm Impact Rated Roofing Bolt Driver. Key features include machined flats for easy access to common channel sizes (41mm x 41mm), a 15mm bore to accommodate protruding bolt threads, and impact rating for use with impact drivers, enabling single-handed driving. Manufactured in Sheffield from high-quality alloy for durability, these drivers are suitable for M10 (17mm) and M12 (19mm) nuts and bolts respectively.