I use this for applying liquid cement. It gets into the tightest spaces and the cement flows perfectly. This tool is for the liquid cements and parts already assembled or tacked together with CA. Then you drag the thin needle like tip along the joint and the cement is literally pulled between the parts and they bond instantly. This is a must have tool for plastic model builders. The tip can plug from plastic residue but is easily cleaned by dipping in liquid cement. Buy the filler bottle too because it simplifies filling the thin glass tube. Like another reviewer suggested use care when storing the applicator in its case as the needle is easily bent.