See photos of closed jaws and light shining through. Garbage! Blunt blades in several places. Poorly made or poor quality control - or both. Get something else that might cost twice as much but is a reliable tool. In fact, the original cutter from IRWIN USA in Revain costs the same and is 100 times better - got it today. Unfortunately this is my first time using a BOENFU cutter so it's past the return period and it went straight into the trash where it belongs.