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8 Pcs Drill Bit Stop Collar Set Split Ring Clamping Shaft Collars Drilling Limit Ring Drill Depth Stop Bit with M5 Set Screws (Imperial 1/2", 7/16", 3/8", 5/16", 1/4", 7/32", 3/16", 1/8") electronics3 our nylon acorn nuts has8 Pcs Drill Bit Stop Collar Set Split Ring Clamping Shaft Collars Drilling Limit Ring Drill Depth Stop Bit with M5 Set Screws (Imperial 1 2", 7 16", 3 8", 5 16", 1 4", 7 32", 3 16", 1 8") Eyech 8Pcs Drill Stop Bit Collar Set Imperial Sizes 1 8", 3 16", 1 4", 5 16", 3 8", 7 16" and 1 2" Split Ring Design Drill Bit Depth Stop Collars with Allen Wrench Feature: Accurate Drilling Depths: Includes a wide range of drill stop collars, ensuring you have the