carpenter's plane
鉋 centers on a carpenter's plane, a tool used to shave and smooth wood surfaces.
鉋 combines 金 (metal) with 包, which likely contributes the sound and suggests wrapping or enclosing, perhaps referring to the plane's blade encased in a metal body.
The left side 金 is metal, and the right side 包 looks like a wrapped package. Imagine a metal tool wrapped around a blade that shaves wood smooth: a carpenter's plane.
For ホウ, picture a carpenter using a plane and saying 'hoe!' as he pushes it along the wood: hoe -> ホウ, and the metal blade shaves the surface.
plane (woodworking tool)
round carpenter's plane
spokeshave; spoke shave
wooden plane with a convex base curved in the cutting direction
plane with a blade at ninety degrees to its base used for maintaining the bases of other wooden planes
wooden plane with a convex base curved both along the direction of cutting and across the blade
yariganna; long-handled chisel
wood shavings
planing (wood)
cutting blade of a plane