Great Planes GPMQ5006 Precision Prop Reamer, Standard Shaft is an essential tool for RC pilots who need clean, accurate enlargements of propeller hub openings to fit standard (inch-based) motor shafts. Hardened steel cutting surfaces deliver precise, centered holes for safe and balanced propeller operation.Key Features Hardened steel cutting surfaces for clean, accurate hub enlargement Standard inch-based shaft sizing — fits common sizes including 1/8", 5/32", 3/16", and 1/4" Stepped design gradually enlarges the hub hole for a precise fit Creates perfectly centered holes to prevent prop wobble and imbalance Ergonomic handle for steady control during use Suitable for electric and glow/nitro RC aircraft applications Specifications SKU GPMQ5006 Tool Type Precision Prop Reamer Shaft Type Standard (Inch-Based) Material Hardened Steel