FOCSTOL Serrated Masonry Drill Bit Set 10pcs - High-Strength Eccentric Twist Drill Bit for Wood Plastic Masonry Ceramic Tile Concrete Marble 3/16''-1/2''

Package Include-----Total 10pcs drill bits: 3/16''(5mm), 1/4''(6mm), 5/16''(8mm), 3/8''(10mm), 1/2''(12mm); 1/4'' quick change hex shank

Application-----Dry drilling materials (softer materials) are wood, plastic (PVC pipe), foam tiles, antique tiles, glazed tiles, red bricks, cement, concrete (need to avoid reinforcing steel), etc; need to add water or coolant drilling materials (harder materials) are glass tiles, porcelain tiles, ceramics, marble, glass, etc

Cross-serrated Head Design-----The sharper cutting head reduces bit slipping and walking, allowing for more accurate positioning and more stable drilling. It can be used not only for direct drilling but also to assist other drill bits in achieving precise hole positioning

Premium Material–Tungsten Carbide-----The drill tip is welded with industrial-grade tungsten carbide, offering excellent wear resistance and the ability to easily penetrate various materials. The drill body is made of high-strength steel, ensuring a long service life

Recommended Machine-----Corded Drill, Cordless Drill, Benchtop Drill. Use electric hand drill: Recommended speed not less than 2000RPM; Faster the RPM, longer the drill bit's working life