Not worth the price. I had a CNC engraver for several years; primarily for engraving on clear acrylic for side-lit creations. They don't glue or cut long enough to engrave a single 3.5" x 7" character (it took three bits). Acrylic clumps regardless of spindle speed or feed rate. Tried another brand (duplicate bits for a lower price) and cut 3 times less on a bit. It's one thing when I compare them to different base materials, but the signs are all cut from one large sheet of acrylic. Twice as expensive and 1/3 life. Not good.