VEVOR R8 Boring Head 2-Inch Indexable 8 Piece Boring Bar Set with R8 Shank, for Milling Machine Drill Press, 7/16" to 4-1/2", Precision Bore Diameter Adjustment, Hardened & Ground, Labeled Storage Box

Secure Clamping, Durable Build: Made from 45# alloy steel with heat treatment and precision grinding, this R8 boring head delivers strong clamping force, excellent wear resistance and impact resistance for stable machining performance,Precise Bore Diameter Adjustment: Featuring a 2" boring head with a clear graduated scale, this R8 boring bar set allows accurate bore diameter adjustments during machining for improved accuracy,Wide Boring Range Capability: With a 7/16" to 4-1/2" boring diameter range, this R8 boring head set supports various workpiece sizes and machining requirements, providing great flexibility for different applications,Easy Storage and Portability: This indexable boring head set includes a durable storage case that keeps all components neatly organized, making tool management easy and allowing convenient transport,Complete Accessory Kit: This R8 boring tool set includes an R8 shank, precision boring head, 6 boring bars in different lengths, wrenches, and hex keys, providing all essential tools for versatile machining tasks