Feature: 1. High Quality Material: It is made of anodized aluminum with black oxide stainless steel thumbscrews, which is durable. Hexagonal plane has greater friction and better working performance. 2. Tall Design: The ultra high body enables it to remove the edges and irregularities of the workpiece, so as to provide accurate frame fixture layout. 3. Main Application: It is mainly used for stair longitudinal beam layout, rafter layout, etc. It is easy to arrange on any material, especially when there is a crevice at the edge of the wood. 4. Save Time: It is very suitable for repetitive work, such as cutting rafters, longitudinal beams and stairs. You don't need to realign frame square every time to mark the next step. 5. Large Knurled Thumbscrew: The large knurled thumbscrew makes it easy to grip and tighten onto any rafter square even when wearing gloves. Specification: Item Type: Framing Square Attachment Jig Material: Aluminium Alloy Weight: Approx. 96 g / 3.4 oz Color: Blue. Package List: 2 x Framing Square Attachment Jigs Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.