ADJUSTABLE: Adjusts from 0 to 45 degrees in 5-degree increments in either direction of vertical drill position.POSITIVE STOP: Built-in depth stop for accurate drill depth.WORKS WITH DOWELS: V-groove for positioning round stock, pipe or tubing. A slide lock facilitates sanding and buffing.STABLE: Anchoring pins to hold the guide securely in place on flat surfaces, narrow edges or large tubing.DRILL EFFORTLESSLY: Updated linear bearings allow for a smooth guided drilling experience. Now more durable than ever, the General Tools 3638 multi-purpose drill accessory is ideal for angled drilling, doweling, plug cutting, and edge sanding. Attaches to any 3/8 in. or ½ in. power drill. Heavy body allows user to handle the toughest tasks with out the worry of movement or slippage. Adjustable in 5-degree increments from 0 to 45 degrees, left and right. A slide lock facilitates sanding and buffing applications. This drill guide and chuck can be folded flat for toolbox storage.