MJ's Sharpening - Sharpening Blades, Chains, SAws, & More Sharpening service located in Florence, WI, servicing Florence County and the surrounding area. Meeting the sharpening needs of contractors, manufacturing, and private individuals. SHARPENING SERVICES professional equipment fast turn-around detailed, SHARP finish Serving: Florence, WI; Iron Mountain, MI; Crystal Falls, MI; Iron River, MI; Crandon, WI; and surrounding area.