Create perfectly shaped cavities for our StewMac battery boxes.Accurate template placement is easy—crystal clear routing templates allow you to see the guitar body underneath. Simply align the template's laser etched centerlines with the markings on your guitar to get placement right every time.StewMac's improved templates are now thicker with smooth laser-cut edges. Correct depth measurements are etched right on the template, so you don't need to puzzle over cavity dimensions, we've done that work for you."These improved, thicker templates mean I don't have to shim or double up templates to get contact with the router bearing." — Erick Coleman, guitar repairman and StewMac tech advisorThis Battery Box Routing Template is for routing a single battery box cavity.Thickness: 3/8" (9.53mm)Outer dimension: 5-7/8" x 3-7/8" (149.22mm x 98.42mm)Clear acrylicLaser etched centerlines and depth measurementsCountersunk holes for anchoring the template with flathead screwsCreate precision cavities every time: Align the template's centerlines with those you drew on your guitar. All you need is double-stick tape to keep the template in place. Optional: use flat head screws dropped into the counter-sunk holes—the router glides right over them. Use your router to lower a ball-bearing router bit (not included) into the wood and make several shallow passes until the bearing rides smoothly along the template edge. When the bearing can ride against the cavity wall, remove the template so you can rout to the recommended depth engraved on your template.