Bisco of Florida has for sale Replacement Drill Chuck Keys K30. This Chuck Key is for use with Jacobs, 30, 30-1A, 30B, 31B, 31BA, 8-1/2N, MC4. Bisco Tool Supply has for sale affordable Drill Chuck Keys. These replacement Drill Chuck Keys fit Jacobs Drill Chucks and other major manufacturers. Bisco Tool is your source for Drill Chuck Keys and Jacobs Drill Chucks and Wholesale Drill Chucks. Don't see the key you need? Don't know what key you need? Call Bisco Tool Supply Toll Free at 1-866-247-2635 and Bisco's sales staff will gladly find the Drill Chuck Key at wholesale prices!