Use your 500-Series Pocket-Hole Jig to create compact pocket holes. This unique Micro-Pocket Drill Guide Kit creates a 25% smaller pocket hole 24mm (15/16 ) long that works great for smaller projects, thinner stock, and tighter repairs. Micro-Pocket holes work great in virtually every application where youd use standard pocket holes, and are especially good for 12mm (1/2 ) thick material and narrow stock, down to 25mm (1 ) wide. Because the bit removes less material, drill strokes are faster and easier. Just insert the Micro-Pocket Drill Guide block into your Pocket-Hole Jig 520PRO, then use the Micro-Pocket drill bit to create the compact pocket holes. For use with 500-Series Pocket-Hole Jigs. Compatible with Kreg pan-head pocket-hole screws.