Body made of malleable cast iron, teeth milled heat treatment, used for gripping pipes in room

SPECIFIC       QTY(pcs)   MEAS(cm)   G.W./N.W.(kg)
1#(10-60mm)      8       47*23*21      31/30
2#(10-90mm)      6       29.5*26*25    31/30
3#(15-115mm)     4       29.5*26*25    31/30
4#(15-165mm)     2       38*30*16      26/25