Sterling Silver Round & Oval Jump Ring Assortment-Lightweight-120 Pieces Durston Thermo-Fix Soldering Clay is a

Thermo-Fix Soldering Clay is a reusable clay from Germany for holding small parts during soldering and for protecting heat-sensitive areas

Knife-edge (tapered) profile for detail work in grooves and tight contours

Uniform coverage from start to finish

Their advanced blade geometry — typically reserved for steel tooling — is engineered to power through the toughest metals

Sterling Silver Round & Oval Jump Ring Assortment-Lightweight-120 Pieces Durston Thermo-Fix Soldering Clay is aThis lightweight assortment brings together 120 open sterling silver jump rings in a mix of round and oval shapes, offering ten distinct sizes in a single convenient set. Each of the ten styles is represented by 12 pieces, giving jewelers and metalsmiths a practical range of ring dimensions for chain work, clasp attachment, component linking, and other bench applications. Wire gauge ranges from 22 ga (0. 64mm) to 20 ga (0. 76mm), making these rings