Large Inside Ring Bur - Fine, 3/8" x 3/4", 1/8" Shank sulfur all are ground and polished

all are ground and polished to prismatic optical standards to provide clearer

Solder : Hard & Medium - 6" each

Steel economy blocks hardened then carefully drawn for stress relief

Maximum cut: 18 gauge (1mm) soft wire

Wire gauge drill sizes and decimal equivalents (inches) permanently etched

Large Inside Ring Bur - Fine, 3/8" x 3/4", 1/8" Shank sulfur all are ground and polishedMade of carbide steel to assure extra long life, these inside ring burs are used for deburring, smoothing and finishing the insides of rings. Great for cleaning up hollow contraction ring and remove sprue from casting. This a larger version of inside ring bur (rotary files) Head Diameter: 3 8". Head Length: 3 4". Shank: 1 8". Cut: Fine.