A professional who tends trimming machine fitted with rotary cutting knives or single blade on spring pole to trim rough roofing slate to largest size that slabs will make. Responsibilities include:

• Sets notched bar that enables slab to be cut to desired size.
• Holds irregular slate slab beneath rotating cutting blade to trim edges.
• Turns slab and trims other edges.
• Sharpens cutting knives on grinding wheel.
• May split flagstone along cut line, using hammer and chisel.