Foredom's chisel handpiece gives a power assist to carving in all types of wood, plastic, and soft stone. The #50 is a reciprocating æhammerÆ type handpiece that requires light pressure to engage the hammering chisel action. The chisel handpiece is recommended for use at low speed with Series TX and LX motors and in forward rotation only. For optimum performance use between 1,000 - 8,000 rpm. 6ö long, 1ö diameter. Weight 4.65 oz. Bench top speed control is recommended.