This isn't a new invention as I have been using for many years.  Anyway, let's see descriptions by supplier (and Chinese translated by ai).

只需將佢夾落紙膠帶度，就可以用呢一個工具搭配多款紙膠帶使用。經過特別處理嘅 KARU-KAT 刀片可以確保紙膠帶嘅切口平齊乾淨，唔會岩岩巉巉。呢款特製刀片嘅安全設計仲可以防止𠝹傷。

適用於闊度 20 至 25 毫米嘅膠帶。請留意，如果膠帶內徑細過 30 毫米，或者長度超過 10 米，就未必用得。有部份材質嘅膠帶可能會比較難切斷。

Simply clamping the masking tape onto the tape allows you to use multiple masking tapes with this single tool.  Special processed KARU-KAT blade ensures that the cut end of the masking tape is straight and clean, without being jagged. The specially processed blade is designed to prevent injury.

Use tape with a width of 20 to 25 mm. Please note that tape with an inner diameter of less than 30mm or exceeding 10m in length may not be usable. Some types of tape may be difficult to cut.

• KOKUYO
• Dimensions: 48 x 20 x 20 mm
• Material / component: Body R-ABS, R-POM / Blade stainless steel
• Made in China