510628 Darex Llc DD500X Drill Doctor. DD500X Drill Bit Sharpener, Sharpens A Full Range Of Bits Including Split Points The Bits Used In Drilling Hardened Metals, New Quick Change Diamond Sharpening Wheel True Value #870-311, Variable Alignment Lets You Adjust Chisel Relief Angles, Creates Split Points From Standard Points For Faster Penetration Less Drill Bit Walking, Sharpens 3/32 To 1/2 Bits, Sharpens High Speed Steel, Masonry, Carbide Tin Coated Bits, Can Sharpen Up To 3/4 With Optional Chuck Model True Value #870-493, Custom Blow Molded Case.