Its reinforced construction withstands repeated use while minimizing materials splintering, ensuring smooth operations for both installation and removal tasks Color coded marking and engraved size indicators (1~3 / 4 ", 1~3 / 8 ") on the ergonomic handle enable quick identification and secure grip during door latches installations The Door latches Mortise Tool ensures clean, installations for 1-3 / 4 " or 1-3 / 8 " thick door, feature double thickness compatibility and a sturdy ABS design for professional grades result Streamlines door hardware adjustments in residential, workshop, or commercial setting where accurate mortise cutting and latches positioning is critical Ideal for craft enthusiasts, professional woodworkers, and homeowners tackling door upgrades or maintenance projects with confidence, Manufacturer: YanFengPro