Spare Blade for Bench Dog® Tools No. 4 and No. 5 Planes | Rockler Woodworking and Hardware
Stanley Block Plane Blades made by Veritas - Lee Valley Tools
44mm Stanley Plane Blade a2 12-143 Block Cutting and Tapping Tools Hand Iron Planer Replacement Blades Number 4 5 Cutter (Planer Blade 44mm): Amazon.com: Tools & Home Improvement