・Uses: Writing, writing, and marking at construction sites ・Target users: Construction ・Features: Uses a lead designed for construction that is resistant to rain and humidity. ・Writing distance is about three times that of commercially available stationery sharps. ・Specifications: ・Model: SS13MH-HB...Metal head, 1.3mm HB ・Size: 200 x 40 x 8mm ・Weight: 15g