We’ve reblogged this illustration from Boyfriend and ExBoyfriend BDSM Gallery, one of the great sites that Tumblr killed in its purge.
This is a regular series of illustrated guides. You can find the others here.
Spreader bars are an article of bondage equipment consisting of a metal or wooden bar, with attachment points for bondage cuffs at each end, which can be fastened to wrists, ankles or knees to hold them apart. They are used in bondage play, and sometimes in bedroom bondage, usually in association with other bondage equipment.
Wikipedia
FURTHER READING
• DIYBDSM – The Spreader Bar
• YouTube (Drew Lion) – DIY Spreader Bar
• Get Dare – Cheap, Easy, Effective Home-Made Bondage Solutions