Roller sliding tenon setting, when pushing the plate for cutting, the roller plays the role of driving the plate forward. Upgrade lengthen size meets different machine needs. Compatible with #19mm #30mm standard T-slot track. Using the Thin ri Guide is so easy. Jut slide the guide into the T-track miter slot of your table saw and lock it a few inches in front of the saw blade. Set the dimension you wan on the laser-engraved scale, lock your fence so your stock is just touching the bearings and make the cut. Calibrating the scale to your saw couldn’t be simpler. Just bring the bearings up until they touch the tooth of the saw blade and adjust the sale indrcator to the nearest mark. Now you can set the dimension without having to compensate for the thickness ofyou saw blade. Scales for both milimeter and inches arelsrer engraved on the anodized aluminum body to the same tolerance. The Thin Guide is machined from aluminunm alloy. Durable and long service life. Product name: Thin Table Saw Jig. Range of application: Woodworking range of use. Package Included: 1 x Guide Jig.