Find BRASS curved or non-curved safety pins, about an inch + long. (You'll probably have to look on line.)
You can use the Kwik Klip or you can use a cheap serrated edge grapefruit spoon -- I bought a couple @ $1 apiece at the Dollar Tree store. I prefer these to the Klip. You will need many more than you think you will for a bed sized quilt! Start with AT LEAST 200. They are expensive but so worth it.
Brass safety pins are "softer" and easier to open/close. They also do not stain the fabric if left in the quilt for a period. I have stored mine in a box along with the grapefruit spoons for decades.
Jan in VA