Clamps are an essential piece of kit that hobby casters use when assembling their moulds. They are placed on the moulds, with the support boards underneath. Usually they are placed about midway down the vertical of the mould to give even pressure on the moulds. If a clamp accidently pops open, you can very easily bend it back into position with your fingers. To avoid such incidents always squeeze the clamp body before removing the clamp from the mould. Websites: https://www.toysoldierfactory.ie (Visitor centre) https://shop.princeaugust.ie (Toy Soldier Moulds) https://www.mithril.ie (Lord of the Rings miniatures) https://www.facebook.com/toysoldierfactory https://www.twitter.com/princeaugust https://princeaugust.blogspot.com/