These rings correspond with the size of the collet: 0 rings = 1/8"

The 4 mm thick rough grinding wheel

25 1/4" 223

A Mitutoyo stainless steel rule

00 4 5/32" 80 100

Dormer HSS Jobber Drill Bit Set Size:1/16"-3/8" (21pcs) These rings correspond with theThe Dormer HSS Jobber Drill Bit Set is designed for general drilling, metal drilling, pilot holes, fabrication, maintenance, workshop, and industrial applications. Each set includes multiple HSS jobber drill bit sizes organized in a case, making it suitable for machinists, technicians, fabricators, maintenance teams, and workshop users who need a convenient drill bit assortment for daily drilling tasks. Available in inch and metric set configurations,