In KR Build series and movies we only saw the available Lost Smashes.

Hammer Lost and Spanner Lost Smash never appear in the series and never in the movies, and we can only see the Lost Bottles of Hammer and Spanner.

However the Hammer Lost & Spanner Lost Smash did appear in Kamen Rider Build: Final Stage.

Hammer Lost Smash

Spanner Lost Smash

Just to let you all know their suits are just a reuse of Strong Clone Smash & Press Clone Smash.

Well at least we get to know what does Spanner and Hammer Lost Smash looks like.