... in wave solder operations2)Mostly made from molded plastic part, spring, screws and sleeve.3)Working temperature: 200degree, max 280degree (10~20s ... ).4)The action is to press PCB board to protect it from floating and lifting under wave solder process so as ... industry such as fixings, hold downs and clamps for solder pallets / fixtures. 5# Round Feet Single Side Holddowns (a set of four items)