Transformation: fold the back of the Micromaster up 90 degrees to form the lower legs. Stand with the underside facing you and fold the nosecone back.
Phaser's robot mode carries the tapering look of the shuttle's nose over with a wider base and a body that gets thinner the higher it gets. There's not a lot of plastic round his shoulder joints which worries me a bit. His upper legs are moulded in light blue plastic, his chest is red and he has standard Micromaster articulation.
Not great by himself.
Transformation: Fold the front of the Micromaster down to form the feet. Stand with the underside facing forward. Fold the wings back if you want and raise the head up
Blast Master is taller, wider and chunkier than his companion. The robot mode reveals light blue upper legs, a grey chest and a cherry red head. Standard Micromaster articulation again.
Not great again as a single vehicle but a decent robot mode.
Decent combined mode and one decent robot mode vs two bad half vehicles and a not so good robot mode make this a little bit of a mixed bag. But it's a Space Shuttle and Space Shuttles are great :-)
Phaser & Blastmaster were sold in 1990 as part of the Astro Squad with Moonrock & Missilemaster and Barrage & Heave
In Japan Phaser & Blastmaster were sold as part of C-364 Shuttle Rocket W Team with Micro Trailer #4 and their teammates from the Astro Squad Moonrock & Missilemaster
The remaining two members of the Astro Squad, Barrage & Heave and were sold as part of C-366 Radar Hover W Team with Micro Trailer #6 and Powerrun & Strikedown from the Metro Squad.
The remaining four members of the Metro Squad, Wheelblaze & Roadburner and Oiler & Slide were sold in C-365 Fire Tanker W Team with Micro Trailer #5.