Package includes: <br> <br>1pc Small wood bumper ball in 1-3/4" diameter <br>1pc Large wood bumper ball in 2-5/16" diameter <br>1pc Stopper Width x Thickness: 3/8" x 1/8" <br>1pc L-Shape Wrench Length: 3-1/8" x 3/4" <br> <br> <br>Features： <br> <br>◆This Flex Shank Installer Drill Bit Guide Tool kits is designed for guide the flex shank drill bit to keep straight during working. <br> <br>◆This In-Wall Drill Guide Kit is suitable for using in narrow and long space, some out of sight places within the wall. Insert the flex shank bits into the wood bumper ball, fasten the stopper to keep ball in the top position, then it can works. <br> <br>◆This drill bit Guide kits include: 1pc 1-3/4" diameter wood ball, 1pc 2-5/16" diameter wood ball, 1pc 3/8" stopper, 1pc L-shape wrench to adjust stopper. Two different size balls can be used in different working condition base on your needs. <br> <br>◆The two bumper balls are made of solid Wood, and the stopper is made of stainless steel. <br> <br>◆If you have a Flex Shank Installer Drill Bit, please don’t hesitate to buy this guide tool kit, it will much helpful for you to rise your work efficient! It will bring BIG SURPRISE to you, trust me :)