Simple in form, yet intended to be worn with purpose. The Master Series Trine Steel C-rings are as elegant as they are strict...there is no give here! Simply slip a Trine over the penis like a halo, endeavor beyond the shaft for a supremely snug fit. Revel in the pleasure! The Trine Steel Rings can also be used to fit most harness systems. Rings come in 3 sizes: 1.5 inches,1.75 inches and 2 inches.