Well, I ended up using two different types of wire "clamps" or "staples"or whatever you want to call them. And that's only because I couldn't find anything exactly right for the 14 gauge wire size. I used 1/8" bell wire staples for the single run and I used 1/4" plastic, single-nail, coaxial clamps for the doubled-up run of wire. The 1/8" staples just didn't have enough barb left for good penetration into the wood on the doubled-up run of wire. I had to grind a little plastic off the bottom of each coax clamp to get it to hold the wire firmly enough. I made up a couple small jigs to run along the wood and help locate each clamp and staple so the spacing would be even. The wire is now in a nice straight line. Gardner Bender does make that Boss stapler that shoots those insulated staples. The 5/16" blue ones fit my wire nicely, but the depth of the insulator only accommodates a single run of wire and the stapler itself was over $36. I couldn't justify that. I ended up installing 104 staples and clamps, spaced about every 8 inches for the 100 feet of speaker wire. I couldn't really hold the darn staples, so I had to grasp every one with needle-nose pliers and then hammer them in place. Moving on to the next step of the workshop remodel. At least now I can get my lawnmowers, snow blowers, tiller, motorcycle and other crap back up against the wall and out of my way. Still need to do the electric runs and drops and I have two new garage doors waiting to be installed, too, that are in my way and taking up a lot of floor space. If you don't see me on here very much in the coming weeks, that's why. Thanks again for everyone's advice.