Sanrenmu makes several slipjoints with pocket clips, some with backsprings, some with open frame ball detente mechanisms. Models 9051(aka M1), 7112, 7078,9055, are regular sized slipjoints with pocket clips. Most offer one hand opening. Models 4107, 4110, 4108, 4073, 4112, 4109, 4079 are all smaller (around 3" or less closed) with pocket clips. Some of these theoretically offer one hand opening, but can be pretty fiddly because of their size. Models 7099, 7098, 7095, 7089, 7092, 7105 are regular sized with some multitool features, such as folding cap lifters/screwdrivers/seatbelt cutters.