BROWNELLS SCREW CHEK'R

Tells size, threads-per-inch,   diameter, length, tap series, body drill size, and tap drill for machine screws; use to check size of wood and sheet metal screws plus standard rivets. Covers all standard sizes, including 6-48. Use to cut unhardened screws to length, straighten bent screws or battered threads. SPECS: Hardened steel, satin chrome plated. 3' (7.6cm) x 5'
(12.7cm). With instructions. U.S. Thread Model - Checks
#1 through 5/16' in NC, NS, and NF threads. 3' (7.6cm)- x 5'
(12.7cm). Metric Thread Model - Gives diameter and
length in inches and mm, pitch in mm, plus tap and clearance drills
for metric screws from 2mm to 7mm.