121955

1/2" drive, Torx T55 profile, 100mm total length.

Components for fencing or mailboxes, such as the Architectural Mailboxes In-Ground Post , which require "deep" setting in concrete for stability. Product Details: Ombra 121955 Bit Socket 121955

The phrase "" does not appear to be a standard technical name for this tool. However, in the context of hardware and construction, it often describes: 1/2" drive, Torx T55 profile, 100mm total length

This specific tool is widely available from automotive and tool retailers: Torx T55 profile