Gear Driven Power Take-Off (PTO) Transmission System Kit # 160921 This mini-transmission drives 3 attachments onto your DR Trimmer/Mower. The DR TRIMMER/MOWER Power Take-Off has a die-cast aluminum housing and utilizes steel and bronze worm gears to transform the DR's 3,000 RPM vertical shaft to a 100 RPM horizontal output shaft. The result is you can easily add the steel Border Edger Attachment the Cultivating or Lawn Aerating Attachments. Note: For use with SPRINT models purchased after March 2000 with serial numbers 00007 and higher. Also for use with PRO and COMMERCIAL models purchased after October 2000 with serial numbers 17269 and higher. Can also be used with older DRs fitted with the wide-body Trimmer Head Assembly.