One of the better slip joint knife manufacturers is a company called Canal Street Cutlery. Shown here is one of my favorite designs; the Trapper. Canal Street Cutlery has executed this Stag-handled model brilliantly. The workmanship is utterly breathtaking. If you are a slip joint knife aficionado looking for that next serious "step up", try Canal Street Cutlery...I think that you'll really enjoy their work (all US-made).