[gallery] We have them! Order Sure Loc, Emtek, Rusticware, Residential Essentials and Linnea ball catches with us here. Don't know what a ball catch is?: These little buggers a generally used on closet doors where you would use a dummy knob or lever and the latch is not used or needed. It is mounted on the top of the door inside a hole that is drilled on the top surface. A bit of a tug on the door will release the catch.