Features High Accuracy: This jig has high accuracy and the guide hole is made of steel drill sleeve, so you don't need to worry about the drill being worn out when drilling and causing the accuracy to fail. Four Sizes: There are four hole sizes, 3/8in, 5/16in, 1/4in, and 3/16in, which you can use with different situations. V Shape Slot and N Shape Slot: Our jig has a V shape slot for drilling holes in angular and cylindrical faces, and an N shape slot for accurate locating of the hole to be drilled. Light Weight: Our drill guide jig is light weight and very easy to carry, you can take it with you at any place to use. Aluminum Alloy Material: The drill guide jig is made of aluminum alloy, high hardness, strong and wear resistance, anodized finish, corrosion resistance. Spec: Item Type: Hole Drill Guide Jig Material: Aluminum alloy Use: Woodworking tools PackageList: 1 x Hole Drill Guide Jig Package List 1 x Hole Drill Guide Jig