Durston 2127 Large Ring Stretcher Mandrel Prop 65 - Silica while a zinc-plated heavy-duty air

while a zinc-plated heavy-duty air pressure regulator with an easy-to-read dial ensures you maintain the correct pressure every time you inject wax

with one edge single-cut and one edge safe (no teeth)

US customers seeking a comparable product should inquire about MB Formula Melting Flux as an alternative

The kit centers on a premium frame paired with a clip-on lens holder

Precision epicyclic variable-speed gearbox — smooth

Durston 2127 Large Ring Stretcher Mandrel Prop 65 - Silica while a zinc-plated heavy-duty airThe Durston 2127 Large Ring Stretcher Mandrel is an expanding mandrel purpose built for enlarging and truing rings with larger diameters. Its compact 92 mm length keeps it practical for bench use, easy to stow in a drawer, or pack into a tool roll. Once secured in a vise, clamp, or appropriate machine fixture, the mandrel expands evenly as you tighten the center bolt with the included hex keygiving you controlled, incremental sizing without distorting