
140mmcir110 Down The Hole Low Air Pressure Button Bits. Premium Material Composition: Constructed from premium nickel-alloy steel and high-grade tungsten carbide inserts for durability. Advanced Heat Treatment: Utilizes mature heat treatment and stress relief processes to ensure consistent performance. Wide Diameter Range: Available in sizes from 76mm to 250mm including 76/90/100/110/120/125/130/140/150/165/175/185/200/220/250mm. High Penetration Rate: Designed for maximum performance, hole cleaning ability, and high penetration rate in hard materials. Versatile Application: Suitable for cutting and drilling hard non-ferrous materials like marble, granite, concrete, and brick. Rapid Response Support: Sales team responds to inquiries within 24 hours excluding holidays. Quality Replacement Guarantee: Free replacement provided once failure is confirmed to be caused by product quality. Certified Manufacturing: Manufactured under ISO9001:2015 and SGS standards with CNC machinery processing.