Anti-rust smooth runners

Material: PC+ABS

low-high speed design powerful enough to support heavy grinding

you can always apply just the right power to blow away even the biggest maintenance chores

Cooling Fan: 5W

Dry Core Drill Bit, 88.9 mm Diameter 11 Threaded, 241.3mm Depth Diamond Coring Bore Tool with a Pilot Bit & Blade, Masonry Hole Saw Bits for Hard Concrete Brick Office Anti-rust smooth runnersProduct Features Efficient & Smooth Drilling This diamond core drill comprises premium aluminum alloy components, and high quality diamond grits ensure a longer coring life. Diameter: 3. 5 in 88. 9 mm, Drilling Depth: 9. 5" 241. 3 mm. A pilot bit and an extra 4. 5" 114. 3 mm blade is included to increase your efficiency. Engineered for Exact Fitting With a 5 8" 11 universal thread, this core drill bit allows easy and rapid assembling to a standard