Package List 8 x Drill Bit Collars Characteristics - Specification: 3, 4, 5, 6, 7, 8, 9, 10mm Woodworking Drill Bit Locator. - Size: 1.70X1.00X0.80cm/0.67X0.39X0.31 inch Drill Bit Positioner. - Assorted sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm Woodworking Drill Bit Positioner. - Material: Stainless steel Metal Drill Bit Positioner. - Color: Silver Drill Bit Collar. - This drill bit depth stop collar is widely used for woodworking drill bit consistent drilling Woodworking Drill Bit Ring. - Mainly for fixing the drill bit, limited the depth of drill holes, make depth of the hole consistent Woodworking Drill Bit Collar. - This depth stop collar can be locked anywhere along the bit, widely used for high carbon steel drills Drill Bit Ring. - Fine workmanship and creative appearance ensure its popularity and practicality Metal Depth Stop Collar. Goods Description drilling bit ring Bit rings are used as a shaft collar on machinery and can be used on drill bits or brad point drills or any type of bit to prevent excessive drill bit penetration and for any jobs that uses a bit and needs precision