Specification Brand : Vvikizy BulletPoint1 : FEATURES: STURDY stainless steel material, suitable for high carbon steel drills, screw type collar prevents damage to bits, used for drilling limit and preventing drilling too deep. BulletPoint2 : SPECIFICATION: Includes 12 spacing rings with inside diameters ranging from 3-16mm, made of stainless steel, weighs approximately 105g. BulletPoint3 : HOW TO USE: Simply attach the depth stop collar to your drill bit using the hex wrench provided, adjust to desired depth, and start drilling with precision. BulletPoint4 : PACKAGE LIST: Includes 12 spacing rings and 1 hex wrench for easy adjustment, a convenient set for various drilling tasks. BulletPoint5 : NOTE: The product may come in different variations (old or new type) but both serve the same purpose, so rest assured that you are getting a quality drilling accessory. IncludedComponents : 1 x Self-Centering Vice IncludedComponents1 : 1 x Vise IncludedComponents2 : 6 x 304 Stainless Steel Screw ItemName : Drill Bit Depth Stop Collars, 12pcs 3-16mm Stainless Steel Drill Depth Stop Bit Collar Set Drilling Limit Ring ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 7 centimeters ItemPackageDimensions_Width : 5 centimeters ItemTypeKeyword : pin-vises Manufacturer : Vvikizy ModelName : Vvikizy9ypfwhaveg ModelNumber : Vvikizy9ypfwhaveg NumberOfItems : 1 PartNumber : Vvikizy9ypfwhaveg ProductDescription : Specification: Size (inside diameter) : 3,4,5,6,7,8,9,9.5,10,12,14,16mm Material: stainless steel Weight: 105 g / 3.7 oz(approx.) Package list: 12 * Spacing Ring 1 * Hex Wrench Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.