Fabrics & materials

A flat metal hook and matching straight bar used mainly at waistbands to hold the closure edge to edge without overlap.

A small metal fastener pair, a bent hook that catches on a loop or bar, used at waistbands, plackets and the top of zips for a flat, secure closure.

A two-sided fastening tape of a stiff hooked surface and a soft looped surface that grip when pressed together, used for adjustable or quick-release closures.