Second-fix skirting
You are scribing skirting or architrave and you want a pin-end coping set with a tooth count near 18 TPI if the board is MDF. The Avit at about £13.84 lists 16 and 20 TPI wood blades plus 24 and 28 TPI metal blades, and a UK text mentions 18 mm MDF skirting. It is a shallow coping frame, not a deep fretsaw.
















