Measures fractional bolts from size #4 to 1" up to 7" long
Measures metric bolts & screws from size 3mm to 22mm
Made of very durable 1/4" thick hard plastic
1/4" thick x 8-3/4" Long x 3-3/8 Wide Color: Red
This is a must have tool for anyone who uses bolts, screws or nuts. It easily measures diameter, thread pitch and length of most nuts, bolts and screws.