Putting a Lip on Your Steel Square Did you ever wish your steel square had a lip to catch the edge of a piece of lumber, like a Speed Square? The Square Fence is a gadget that lets you add a lip to your framing square. Once the fence is attached, just remember that the dimensions along the top edge of the square are now offset by 3/4 inch. The Square Fence (part #O5N5401) sells for $13. Contact: Lee Valley Tools, P.O. Box 1780, Ogdensburg, NY 13669-6780; 800/267-8735; www.leevalley.com. A Better Utility Knife Twenty years ago, utility knives were fairly primitive — simple steel handles that required a screwdriver to change the blades.