Sinclair stainless steel neck turning and expander mandrels are precision-made from high-grade stainless steel and are designed for 17 to 50 caliber cartridges.
The mandrels are available in two types: turning mandrels sized .002 inch under bullet diameter and expander mandrels sized .001 inch under bullet diameter, with carbide mandrels offering even tighter tolerances.
Large caliber mandrels, suitable for 35 to 50 caliber, are compatible exclusively with the Large Caliber Expander Body and NT-5000 Turning Tool.