1-3/8" HSS 4MT Spiral Flute Bridge Reamer Shopify Collective They are made from M42

They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications

Part Number DWTSMR3-46X4

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Part Number DEWAL-16C2

316 Stainless Finished Hex Nuts

1-3/8" HSS 4MT Spiral Flute Bridge Reamer Shopify Collective They are made from M42Product Description Also called Construction Reamers, Bridge Reamers are used to align existing holes prior to bolt or rivet installation. The point is tapered to permit entry into overlapping holes. It's short length facilitates use in areas with limited access. Taper shank bridge reamer is commonly used in electric and pneumatic portable equipment. Brand Drill America Part Number DWRRB1 3 8 Size 1 3 8" Material High Speed Steel Finish Uncoated