1、Wide Compatibility: This woodworking guide jig fits 30, 45, 19, 20, 74 type, 50/66 T tracks and 3/4 x 3/8in standard miter slots. Compatible with most standard band saw, table saw, and router on the market. 2、Extended Range: Upgrade and extend the telescopic range to 175mm (6.89 inch) to meet the needs of different machines. Includes larger, wider, and easier to turn screws. More secure and stable for long lasting use. 3、Easy to Use: 2 bearings drive the workpiece forward at the tip of the thin ripping jig, keeping the cutting width consistent and smoothly feeding the workpiece. Making accurate cutting easy and efficient. 4、Robust Structure: Made of excellent aluminum alloy with anodized finish for good durability and high stability. Jig enters the miter slot and securely locks all components in place for accurate cutting. 5、Readable Scales: Accurate locating in inch with a unique sliding tenon design for stability. Adjustable internally and externally, secure locking without wobbling for accurate cutting without drift.