Heavy-Duty Bolt & Drill Bit Index Gauge 1/16 to 1/2 Inch by 1/64ths

Metal Drill Bit Gauge Wire Bolt Size Diameter Index Metric and SAE (Black)

Boltsize-It Gauge, Blue

Stainlesstown Nut Bolt Screw Thread Gauge RED

Screw Chek’r SAE/ Inch Screw Thread Size Gauge (No. 1 to 5/16) 1/8 Inch Heavy Gauge Steel Screw Checker, Made in USA

Irwin Tools HANSON 60172 Drill Bit

Screw Chek'r SAE/Inch Screw Checker (No. 4 to 1/2) 1/8 Inch Heavy Gauge Steel Screw Checker, Made In USA

Nut and Bolt Gauge , Metric, UNC, UNF, with Thread Pitch on Back(5 Colors to Choose From in Listing) (BLUE)

Irwin 12092 1/16-to-1/2-Inch 29-Hole Steel Drill Bit Gauge

General Tools 15 Drill Gage, Number Size Drills 1 To 60

Nut and Bolt Gauge , Metric, UNC, UNF, with Thread Pitch on Back(5 Colors to Choose From in Listing) (RED)