PROCTOR NEEDLES (SPRING TYPE )
The instrument consists of a needle attached to a spring loaded plunger, the stem of which is calibrated to read 0 to 40 kg division. Long Stem is graduated at every 12.5mm to read depth of penetration and for use with needles of larger areas. The small penetration stem is also graduated in 12.5ml division and is used with needles of smaller areas. Needle points one each of 0.25 , 0.5 1.0, 1.5, 2.0, 3.5, and 6.0 sq. cm. And a tommpy pin. Graduation at every 12.5mm to indication depth of penetration are marked on longer stem for use with needles of larger areas. Smaller stem in also graduated at every 12.5 mm and is used with needles of smaller areas. Complete as above in a wooden carrying case.
BELLSTONE HI-TECH INTERNATIONAL