Contractor Pro Gatorback Shoulder Combo with Tray. Handy Bag for Hvac, Mechanical and Electrical Contractors. Comfortable Ventilated Shoulder Strap. Handy shoulder bag with 15 pockets (12 interior, 2 exterior, 1 upper) and 5 Exterior Tool Slots On the side has a hammer loop and a Electrician's Tape Chain The 8 compartment tray easily tucks into the tool bag creating a sleek design Utility and size makes it easy to have everything you need no matter what the job requires