Carmex Tiny Tool Holder - Square Shank Holder to hold Carbide Small Boring Tool - 5mm Bore x 10x16The Carmex Tiny Tool Holder, in a square shank design, is built to securely grip carbide small boring tools (Tiny tools) for precise machining in tight spaces. Bore: 5 mm Shank design: Square shank for a secure, stable grip that minimizes slip during cutting Compatibility: Specifically engineered to hold carbide small boring tools (Tiny tools) with reliable alignment Size & geometry: Compact footprint suited for use in small components and restricted