Star-M 58S-S3080 Countersink Drill & Plug Drill Set 3x8x8

Countersink drill bits: 3 (pilot hole size) x 8 (countersink size), plugging drill bits: 8 Shank diameter: 6.35mm hexagonal shank, Countersink angle: 90 degrees Material: Ordinary steel - plated finish Applicable materials: General wood, Applicable machines: Impact driver 14.4V or higher - Drill driver 14.4V or higher - Electric drill Recommended rotation speed: 3,000 rpm or less