Portable stair knobs do circular saw guide Rafter system do woodworking Description: [Precise design]: Square do frame fixing instruments, flat hex meter is more suitable do edge, just set the indicators za using a specific ruler and adjust the distance of the screw to fix the meter. [High Quality Material]: The staircase instruments are made of high quality aluminum alloy, strong and lightweight, measuring 1,18 inches x 4,33 inches x 1,18 inches. [Professional Tool]: The do Square Attachment is a must-have for stair builders, ensuring accurate frame mounting arrangements za time. [Tool do high stair indicators]: The tool do knobs do of stair guides can be securely fixed do square, square or circular saw. [Application]: This square frame meter is used do stair layout, rafter layout, circular saw guide, etc. Specification: Material: Aluminum Alloy Size Chart: 3 cm x 11 cm x 3 cm / 1,18 inch x 4,33 inch x 1,18 inch The package includes: 1 tool do stair knobs