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Save Time & Money With The Great Service We’ve Delivered To Our Customers Since 1974! For those of you who are Diamond Tool customers, thank you for your patronage. For those of you who may not be familiar with Diamond Tool, we are an actual brick & mortar building, servicing the Philadelphia Tri-State area with our salespeople & our delivery trucks. Diamond Tool understands the needs and pressures on the professional contractor. We have a trained sales staff who can answer more questions than just, “is this part number in stock?” We advertise & show what we stock, and we service what we sell. Diamond Tool provides a reliable service to meet the needs of the professional tradesman.