EXPANSIVE UTILITY: Beyond its primary role in drilling, the Saker 4-in-1 Drilling Positioning Ruler proves invaluable for diverse applications including the precise installation of door handles, crafting bespoke shelves, and constructing cabinets. Its multifaceted design enables versatility, rendering it an indispensable tool for an array of woodworking and DIY projects. HIGHLY ACCURATE: The saker drill positioning ruler doubles up as a marking gauge woodworking tool, boasting three sets of adjustable positioning blocks. This innovative design ensures enhanced precision, facilitating swift and accurate drilling, nailing, or marking tasks. Elevate your woodworking projects with increased efficiency and accuracy with this versatile tool. DUAL-AXIS BUBBLE LEVEL: Saker woodworking square comes with auxiliary dual-axis bubble levels, aiding in the calibration of both horizontal and vertical alignments. This feature ensures precise leveling and perpendicularity, facilitating accurate drilling and installation tasks, even on uneven surfaces. RELIABLE MATERIAL: Crafted from premium aluminum alloy, the Saker 4-in-1 drilling positioning ruler guarantees durability and resilience. The wear-resistant printing ensures longevity, safeguarding against fading and preserving precise measurements throughout extended use. VERSATILE ADJUSTABLE CAPABILITY: Saker T square ruler features ABS knobs for effortless adjustment of length and angles, ensuring flexibility in measuring both dimensions and angles. With this versatile capability, users can easily adapt the tool to accommodate various project requirements.