SDS Plus Flat Wood Chisel 20mm or 30mm ideal notching out wood window removal
Bevel Edge Wood Chisel Set 3pc - WEL BM
G1/21 – Straight flat chisel G1 (21mm) - Beaver Craft – wood carving tools from Ukraine with worldwide shipping
Utoolmart Wood Chisel for Carpentry 18mm Width Flat Carving Head High Carbon Steel and PVC Handle for Woodworking Hand Tool : Amazon.co.uk: DIY & Tools
Vintage Ross & Alexander 3/4” Heavy Duty Flat Firmer Chisel – Sharpened Honed | Tooltique
Triton-Wood Chisel Set 3pce – sidtelfers diy & timber