Professional Duty Masonry Drill Bit-Fast Spiral [並行輸入品]

商品説明

Tested other carbide grades, current grade performed the best. Drill bit. Diamond ground tip with more aggressive cutting angles for increase drilling speed. Changed back angle from 10? to 24?. More aggressive 26.0 mm flute pitch. Tested other carbide grades, current grade performed the best. Optimized flute geometry for fast dust removal. Large carbide tip for increased life. For drilling masonry blocks and bricks. 3/16" x 4". Length: 1.75. Width: 7.25. Height: 1.75