This double pole (two pole) main switch disconnector is a standard and popular part made by ABB, part number E223-20 (catalogue number: 2CCE130200R0121). Rated for 32A at 250 Volts ac, it is a single width DIN rail mounting module which physically disconnects both poles when switched.
Ideal if you need double pole isolation and small size fits easily into a consumer unit in place of a single pole MCB.
The din rail connection could be a little bit more tighter but if fitted between other MCB's it is fine.