Use to pin to carpet but back & knees hurt too bad. Bought some of those big clips from Home Depot last year & measure where center is & draw lines both ways on backing. Then do same for batting & top. Have an 8ft table that I lay backing out on & clip to table. Then add rest. Get center down & in right place & start smoothing out. Then I use safety pins & I baste to. It so far has worked ok. A king is a little trickey but the rest work out good.