• The 1-Inch diamond grit drill bit will drill through glass, marble, class 5 porcelain, granite and slate

• Outperforms the standard carbide glas and tile bits on the market today, both in speed of drilling and the number of holes that can be drilled per bit

• These bits feature raised lips with diamond grit particles that are uniquely sintered in place allowing the diamonds to adhere to the bit

• The Hitachi diamond grit drill bit bodies are constructed of hardened and tempered thin wall alloy steel

• Comes with a 30-day limited warranty

The Hitachi 729408 1-Inch Diamond Grit Drill Bit will drill through glass, marble, class 5 porcelain, granite and slate. They significantly outperform the standard carbide glass and tile bits on the market today, both in speed of drilling and the number of holes that can be drilled per bit. These bits feature raised lips with diamond grit particles that are uniquely sintered in place. The process allows the diamonds to adhere to the bit and not grind down as quickly as other sintering processes. The Hitachi diamond grit drill bit bodies are constructed of hardened and tempered thin wall alloy steel. They require water lubrication during use This can be simply applied with a spray bottle producing a small puddle of water that is spiral fed down the reverse flute threads on the bit to continuously supply water to the cutting edge, cooling the bit tip, and extending its life. This bit is ideal for contractors, serious do-it-yourselfers, machine shops, and mechanics. Hitachi offers the best durability and speed for general purpose drilling applications and has a complete line of professional bits for wood, metal, plastic and light masonry drilling. The Hitachi 729408 1-Inch Diamond Grit Drill Bit is warranted to the original purchaser to be free from defect in materials and workmanship for a period of 30-days from the original purchase date. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.