Specification Brand : Funnytek BulletPoint1 : 【Extended Working Range】The main function of the forstner bit extension is to extend the working range of the drill, allowing you to easily drill in hard-to-reach or space-constrained areas. This feature greatly widens the working area and increases flexibility and efficiency. BulletPoint2 : 【Premium Material】The drill bit extension is made of quality steel, which has high hardness and good abrasion resistance, and can withstand large cutting force and impact, without being easily deformed or damaged. The strength and stability of steel makes the extension to keep stable performance in the bad working environment, which is not easy to loosen or fall off and ensure the smooth running of the work. BulletPoint3 : 【Non-slip Design】The traditional forstner drill extensions were prone to slipping when working with hardwoods, so we developed a non-slip design for the part that attaches to the drill rig, so that the drill jaws can firmly grip the extension. BulletPoint4 : 【Convenient To Use】The use process is simple and quick, without complicated steps. First, use the hexagonal key included in the package to loosen the set screw, then insert the drill rod (not included) into the extension bar, making sure that the set screw is parallel to the flat surface of the drill rod, and finally tighten the screw. BulletPoint5 : 【Wide Application】Total length of 10 inches, 3/8 inch diameter shank,25/32 inch diameter collet, accepts forstner drill bits with handle size of 3/8 inches or slightly smaller, widely used in lathes, hand drills, and drilling machines. FinishType : Black Oxide GpsrSafetyAttestation : 1 IncludedComponents : Forstner Bit Extension with Hex Key Wrench ItemName : 10 Inch Forstner Bit Extension for 3/8" Round Shank Black Hole Saw Drill Chuck Extension Adding 8-3/4 inches Drilling Depth to Forstner Bit for Wood Turners Furniture Carpentry and Construction ItemPackageDimensions_Height : 1.18 inches ItemPackageDimensions_Length : 7.09 inches ItemPackageDimensions_Width : 1.18 inches ItemPackageQuantity : 1 ItemTypeKeyword : forstner-bits Manufacturer : Funnytek Material : Alloy Steel ModelNumber : LQL-BV-20241212 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : LQL-BV-20241212 ProductDescription : Package Included: 1x Forstner Drill Bit Extension 1x Allen Hex Key Specification: Shank Dia.: 3/8 inch Total length: 10 inch Extend Length: 8-3/4 inch Features: We developed a non-slip design for the part that attaches to the drill rig, so that the drill jaws can firmly grip the extension while rotating at high speeds, further preventing work errors. The inside diameter of our forstner drill bit extension collet is 3/8 inch, so this extension will only fit forstner drill bits with 3/8 inch or smaller shanks, please check the size to see if it will fit your drill bit before purchasing. The shanks are 3/8" in diameter and will fit most drills. Please note that forstner drill bits should be larger than 0.8" in diameter to prevent the protruding part of the set screw from scratching the hole wall when drilling. Please note to tighten the screw before use to prevent the drill bit from slipping and falling off when rotating at high speed.