This tool is used to remove and install belts on serpentine belt systems using spring-loaded idler pulleys. Select appropriate socket size and positioning tool idler arm, (handles are only available for 16mm applications.) Pull or pull to release tension. Kit includes 3/8" drive rod for socket wrench 1/2" square drive rod 3/8"dr. 6 point 15mm socket 3/8"dr. 6 point 16mm socket 3/8"dr. 6 point 18mm socket 3/8"dr. 13mm claw wrench 3/8"dr. 14mm claw wrench 3/8"dr. 15mm claw wrench application: 3/8" drive rod for socket and claw wrenches: Ford 1.9 and 2.3L; Universal 3.1L 1/2" square drive lever: Chrysler 2.5 and 3.0L Ford 4.6L. 3/8" drive 6 point 15mm skt.: Ford 3.0 and 3.8L; Chrysler 3.0, 3.3 and 3.8L; GM 2.2, 2.8, 3.8 and 4.0L. 3/8" drive 6 points 16mm skt.: Ford 3.8 and 4.0L. 3/8" driver 6 points 18mm skt.: GM 3800. 3/8" drive 13mm claw wrench : GM quad quad engine 3/8" drive 14mm claw wrench: Saturn Engine 3/8" drive 15mm claw wrench: Ford Windstar with 3.8L engine Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.