Feature: Comes with a step drill bit and some accessories, ready to use. High accurate scale, easy to adjusting drilling height and hole depth. Adjustable dowel hole drill guide for different thickness, easy to producing joints. Within self tighten clamp, convenient to fixing drill guide on the wood. Good abrasion resistance. High strength and hardness. Easy to use. Durable in use. Multi- drill guide, for drilling dowel holes and pocket holes. Specification: Size: . 94 x 80 x 65mm Dowel hole size: . 8mm Pocket hole size: . 9mm Drilling thickness: . 40mm How to Drill A Pocket Hole: 1. Adjust the drill height according to wood thickness. 2. Tighten the clamp and fix the drill guide on the wood. 3. Put step drill bit into the drill guide hole. 4. Turn on the power drill, set to a certain speed of 500-1500rpm. 5. Drill slowly before half of bit drill into wood for higher precision. Color: Blue Material: aluminum alloy Package Contents: 1 x Pocket Hole Jig hole 1 x 9mm drill bit 1 x bit limiting ring 1 x 150mm electric drill head 1 x limit ring adjusting hex key 10 x plastic plug 1 x x 27 self-tapping screws with inclined holes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.