Canon EOS 5D Mark II, 5D Mark III, 5D Mark IV. Canon EOS 5D, 5Ds, 5Ds R, 6D, 7D, 1D. Canon EOS 1D Mark II, 1D Mark II N, 1 D Mark III, 1D Mark IV. And, a shutter release button lock is available which for long exposures shooting and Continuous shooting helpfully.
eBay