Stop drilling crooked holes and start using a DrillBlock+. This lightweight, durable, hand-held drill guide is packed with features that make it simple to put a perfectly straight hole into any shape of stock or type of material. Features: Hardened Steel Bushings - Nine bushings matching today’s most common drill bit sizesMulti-Axis Centering Lines - Built-in vertical and horizontal centerlines for accurate drill guide alignmentV-Groove Channel - Rubber coated V-groove for drilling on cylindrical stock or cornersMore Grip - Improved surface grip with even more non-slip surfaces, including the expanded v-groove channelErgonomic Design - Patented design conforms to grip for comfort during use Specifications: Material: Reinforced nylon and hardened steel bushings block with non-slip TPE FeetBushing Sizes: 3/32”, 1/8”, 9/64”, 5/32”, 3/16”, 1/4", 5/16”, 3/8”, 1/2”