The U.S. Consumer Product Safety Commission, in cooperation with Robert Bosch Tool Corp. of Mt. Prospect, Ill., announced a voluntary recall of about 20,000 Bosch hammer drills. The models have a grounding system and trigger switch that could cause ground wire abrasion and/or ground connector failure posing a shock hazard. In addition, the switch trigger could become stuck in the “on” position posing an injury hazard to the user.

Included in this recall are Bosch 1/2 inch 2-Speed Hammer Drills with model numbers HD19-2, HD19-2D, HD19-2L; and 1/2 inch 2-Speed Hammer Drills with model numbers HD 21-2. “BOSCH” is printed in red lettering on the side of the drills.

The drills were sold at home improvement, hardware and major retailers nationwide and various distributors from September 2009 through August 2010 for between about $140 and $220.

Consumers should immediately stop using the hammer drill and return it to Robert Bosch Tool Corp. for repair.(Note: It is illegal to resell or attempt to resell a recalled consumer product.)

For additional information, contact Bosch toll-free at 866/244-2110 between 7 a.m. and 7 p.m. CT Monday through Friday or visit the firm’s Web site

To see pictures of the recalled products, go