Cut Mortise Loose Tenon Joinery Biscuits Joiners Mills Nov 28, 2018 · The two JessEm Zip Slot Mortise Mills also rely on a handheld drill, but it’s used differently. The drill bit that comes with the Mills looks a lot like a router bit. Make a mortise by pressing down lightly on the running drill and moving the jig’s handle back and forth. JessEm Tool Company Promo Codes - GreenPromoCode.com