Value Collection SC21908S Countersink Set 8pc Cobalt

Product Description

The VALUE COLLECTION SC21908S is an 8-piece countersink set engineered for professionals who need a full range of countersinking coverage in a single kit. The set spans head diameters from 1/4 inch to 1 inch, with a consistent 90-degree included angle across all sizes. Each countersink features a 6-flute design in cobalt steel, which provides superior heat resistance and edge retention compared to standard high-speed steel. The bright, uncoated finish keeps tolerances tight and allows the user to visually inspect for wear. Shank diameters range from 1/4 inch to 1/2 inch with straight shanks for reliable chuck engagement. All six countersinks store in an included wooden block for organized access on the bench or in the shop.

This set is suited for metalworking, fabrication, and maintenance trades where accurate countersinking of fastener heads is required across a range of hole and fastener sizes. Machinists, tool-and-die professionals, pipefitters, and general maintenance mechanics will find the cobalt steel construction appropriate for working in mild steel, stainless, aluminum, and other ferrous and non-ferrous materials. The single-end, right-hand cutting configuration is standard for drill press, mill, or hand-drill use. The 45-degree centerline angle geometry supports precise, chatter-free entry on flat and slightly curved workpiece surfaces.

Key Features

• 8-piece set covers head diameters from 1/4 inch to 1 inch in a single kit
• 6-flute cobalt steel construction for heat resistance and long edge life
• 90-degree included angle on all pieces for standard fastener countersinking
• Straight shanks from 1/4 inch to 1/2 inch diameter for broad chuck compatibility
• Bright, uncoated finish maintains close dimensional tolerances
• Wooden block storage keeps all six countersinks organized and protected

Compatibility

Designed as a general-purpose countersink set for use in drill presses, milling machines, and hand drills accepting straight-shank tooling from 1/4 inch to 1/2 inch.

Installation Notes

Countersink installation and use should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Always secure the workpiece before engaging the tool, and set spindle speed appropriate for the material being cut — lower speeds are recommended for harder materials when using cobalt tooling. Inspect cutting edges before each use and replace any countersink showing chipping or excessive wear. Store tools in the provided wooden block to protect flute geometry between uses.