I used this item for one personal shower build. That means it may have cut about 20 feet of HardieBacker cement board. In other words... still new.
Description from manufacturer:
Cut Backerboard Indoors. Combining our patented precision engineered shear head with a powerful 6.5 amp motor, the Snapper Shear SS424 powers through fiber-cement backerboard for fast clean cuts. With quiet operation and no airborne dust, it’s the perfect solution for indoor work, plus it beats score & snap methods hands-down. Change jaws for Hardi siding. Get the original.
Cuts HardiBacker backerboard up to 1/2” thick. Reversible blades machined from solid tool steel.
· STRAIGHT & CLEAN CUTS - Snapper Shear cuts up to 1/2” thick Hardiebacker fiber cement under layment
· DUST-FREE- Unique backerboard shear design allows for both indoor and outdoor operation. Use indoors without covering the house in dust, easy clean up!
· FASTER & EASIER- when the Snapper Shear is used to cut fiber cement, compared to using score-and-snap, with less broken corners
· POWERFUL MOTOR- Backerboard Snapper Shear boasts a contractor grade 6.5-amp motor
· LOWER JOB SITE COST- increased efficiency and reversible blades machined from solid tool steel need less replacements , durable enough for 20,000 running feet when used appropriately - See more at: https://pactool.us/snapper-shear-backerboard-shear#sthash.i2szaTsw.dpuf