The Model 3S is our most economical machine. It comes with a 3 KVA power supply and can remove up to a 10MM (3/8") size tap or drill in a single pass. It is a great solution for small job shops and companies with occasion......The Model 3S is our most economical machine. It comes with a 3 KVA power supply and can remove up to a 10MM (3/8") size tap or drill in a single pass. It is a great solution for small job shops and companies with occasional needs.