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.