9PCS DRILL SET: 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm x 160mm; drilling depth of 100mm. Suitable for common dowel hole drilling. Not recommended for use with three-claw hammer drills for safety reasons. CARBIDE DRILL BITS: Made of high-quality carbide steel, durable and rust resistant. Tungsten carbide tips provide enhanced hardness, strength, and resistance to heavy loads. Designed for high-density drilling and efficient chip removal. X-SHAPED HEAD: Features an innovative X-shaped geometry with a cross-spline design for improved performance and ease of use. Fully hardened with a double flute spiral for efficient debris removal. 2-HOLE SHANK: Round shank with two holes, standard drill bit design. Supplied in individual red boxes. Suitable for concrete, granite, and stone. Rounded spiral geometry allows effective dust and debris removal. APPLICATION: Ideal for drilling into concrete, ceramic tile, stone, wood, aluminum, plastic, and multi-layer materials. Compatible with SDS-Plus shank drills from brands such as Bosch, Makita, Hilti, Einhell, Kress, and DeWalt. SDS-Plus shank fits standard SDS-Plus chucks only, not SDS-Max.