Bought these thinking they'd be great for a bit of rough and tumble, however the chains connected to the cuffs are longer than id have expected meaning you don't get the full length of the bars . Also, there's a piece of wire with a hook end holding the cuffs inside the (hollow) bar which can be easy in most circumstances to detach them mid session. During my first time with the spreader bar I broke free mid orgasm. Whilst the idea is good it doesn't meet the standards expected for the price, nor the type of product.