When choosing the right wrench, use a lock-channel wrench for plumbing and automotive projects in order to gain leverage on smaller bolts and nuts. Choose the right wrench withtips from an experienced handyman in this free video on home remodeling supplies. Expert: Nigel Gregory Bio: Nigel Gregory of Blue Griffin Handyman in Austin, Texas, has experience with tiling, flooring, painting, landscaping and gardening. Filmmaker: Todd Green