THREE ANGLES: The cable railing drill guide jig dowel allows you to drill 30, 45, and 90 holes for wooden stair railings and deck posts. The angles are fixed with no deviations, and you can quickly drill 30/45/90 holes with an impact drill in the posts and railings, saving you time and effort and getting the work done quickly.FOUR SIZES GUIDE HOLES: With four sizes of drilling guide holes for each , 3/8 inch(9.52mm), 5/16 inch(7.93mm), 1/4 inch(6.35) mm), 3/16 inch(4.76mm), each compatible with cable railing cable protector sleeves and screws. An efficient and compact angled drill guide that is easy to carry.ALL HARD METAL MATERIAL: The drill jig for angled holes is set with ultra-hard chrome-plated steel sleeves, which is wear-resistant, sturdy, and durable, no need to worry about being worn when drilling, and the drilling accuracy is error-free as always. The main body of the railing drill guide is made of high industrial aluminum alloy, hard and durable, with anodized surface, wear-resistant and corrosion-resistant, clear markings.EASY OPERATION: This drill guide for drilling can be used with C and F to prevent the drill jig from wobbling while drilling, and allows for drilling burr-free and crack-free holes. Suitable for the installation of wood, aluminum, and high-speed steel posts and deck railing, cable railing, stair deck railing, and DIY railing projects. (F and C are not included.)Material: Metalcolour: BluePackage Contents:1 x 30 / 45 / 90Angled Drill Guide JigOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.