No 7 industrial ware & building materials opp hostel k Abuja by pass mile 3 port Harcourt city
UST AROUND MILE 3 PORT HARCOURT CITY
A step drill bit (often called a unibit) is a cone-shaped cutting tool used to drill multiple hole sizes with a single bit. It is machined with a series of progressively larger "steps" or tiers, allowing you to control the exact diameter of your hole by how deep you plunge the drill.