This item is an AmeriBRAKES Master Rear Brake Drum Service Kit.

Brake Service Kit. They will fit the following makes and models:

Replacement Parts For 2009-2012 CHEVROLET COLORADO
Replacement Parts For 2009-2012 GMC CANYON

Kit Includes: 

2x Part# 393930 80120 AmeriBRAKES New Premium Balanced Rear Brake Drums
1x Part# 959 New Organic Brake Shoes 4 Shoes 1 Set
1x Part# 7430 REF# 118.66015 H7364 New Brake Shoe Spring Hardware Kit Both Sides Rear
2x Part# W610147 New Rear Wheel Cylinders
1x Part# W80626 New One-man brake bleeding tool kit
1x Part# 2830K Left Side Star Adjuster Kit
1x Part# 2831K Right Side Star Adjuster Kit