"This heavy-duty 3/8in. x 6ft. long chain is for use with the Brush Grubber HD or the Brush Grubber Xtreme Item# 177013. Safety Hook Yes, Recommended Use Brush, trees, Works With Brush Grubber HD, Brush Grubber Xtreme, Compatible With Item Number s 119312, 177013, Application Tugger chain, Chain Length in. 72. Antibacklash-designed Grubber Tugger's spring-loaded hook locks to the Brush Grubber for safety Bright color won't get lost"