We R Memory KeepersAMERICAN CRAFTS/WE R MEMORY WR Metric Trim & Score Board Replacement Blades, 661267

The blades cut well but when I stand my cut and score board on its end the blade falls off. This didn’t happen previously. You can imagine what it’s like scrambling around on a craft room floor looking for it.

Arrived in time.Although I don't use anything thicker than 300 gsm cardstock,the blade would start to tear the paper after a pretty short time of use.WRMK is my favourite brand of paper crafts tools but those blades are a big disappointment.I still recommend the brand and the trimmer but maybe the company would try something different of what blades endurance concerns.