Fangrui Product Details This Upgraded Version: A Belt Protection Cover Is Added, A Pressure Scale Is Added To The Side, The Limit Rod Is Replaced With A Limit Ring, And A Few More Expansion Holes Are Added To The Bottom Plate. The Overall Function Is Better. This Mini Drill Press Machin Has Solid Aluminum + Iron Structure, 795 Dc Motor Ensure Strong And 7000rpm Speed Ensure Strong And Precision Drilling Capacity. It Is Equipped B10 Drill Chuck Compatible For 0.8-6mm Hss Drill Bits For Wood, Plastic Plate, Resin Plate, Aluminum And Another Soft Material Drilling. It Has 3 Metal Axis, 2 Liner Bearings, Dual Spring And Limiting Ring Easy To Operation , Enable You To Control The Drilling Depth Easily. Alignment Hole On The Base Enable You To Locate The Drilling Center On The Base Easily (after Adjust The Pressing Height, Just Loosen The Limiting Ring, Make Sure It Will Drop Down To The Hole Which Means The Bit Is At The Base Center). Add-on Expansion Design With Two Type Slots On The Base Enable You To Install The Mini Bench