A screw tool or “chaser”, no mark, inside, to match the third guide screw on the lathe mandrel, handled. The pair to I2.30. A screw tool or “chaser”, with handle 1790-1819
A chaser for cutting 24 t.p.i.internal or external threads. Chaser for cutting 24 t.p.i.internal or external threads 1892
Two pairs of thread chasers,one of each pair for forming internal threads the other for forming external threads on workpiece in a lathe. One set is for 10 threads per inch the other for 12 t.p.i. Two pairs of thread chasers
