Feature: 1. Multiple Fittings: ABS body, light and strong. Come with keyway chuck, tapered depth control shaft and limit ring, spring rotation, reversible chuck bracket, built in V groove, alignment and adjustable fence 2. Facilitates Center Drilling: The V shaped groove on the base facilitates center drilling of round materials, such as dowels 3. Clear and Accurate Scale: The drilling guide adopts a clear and accurate scale, which can adjust according to the thickness of the wood for accurate alignment 4. Fast and Firm Clamping: Equipped with a quick clamping device for fast and firm clamping. With 1/4in(about 0.6 cm) hex shaft, can be used with cordless and wired drilling machines and impact drills 5. Larger Chip Removal Speed: The pin clamp has a larger chip removal speed, faster chips smooth, more labor saving drilling, and improving work efficiency Specification: Item Type: Portable Drill Guide Material: ABS+aluminum alloy+stainless steel+brass Purpose: Woodworking locator Color: Red Chuck Clamping Range: 1.5 ~ 10mm / 0.06 ~ 0.39in. Package List: 3 x ABS Board3 x Aluminum Alloy Rod1 x Aluminum Alloy Rod with Spring1 x Connecting Rod2 x Brass Rod4 x Screw5 x Nut5 x Big Screw1 x Socket1 x Chuck1 x Special Key Note: The drill bit should not touch the wood before starting the electric drill.