Brass Plumb Bobs, 16 oz, Hardened Steel/Brass

General Tools professional quality Brass Plumb Bobs have been a staple of the masonry, carpentry and surveying industries for more than 50 years This retractable plumb bob is also equipped with a hardened steel point that has standard 10 to 32 threads; The tools hardened steel point is accurate to within 1/100 and is easily replaceable