An EE was making a vacuum hose for M-27 Bolter in the Smag Bay. The EE was holding the hose with their left hand and cutting with their right. The force needed to cut the hose to length caused the knife to go all the way through, but sliced the EE's pointer finger at the same time. EE was not wearing gloves during this job. The EE received 5 stitches on their left pointer finger.