I pulled out my 1990 Stihl brochure (I need to throw some of these things out) and the model number was a BT-310 Drill, It says that it can mount on;
009,011, 012, 020, 021, 023, 024, 026, 028, 034, 038. It takes drill bits from 3/8 to 1 1/4". It looks very similiar to the photo in the...