Designed for use with conventional coil springs with a mono-ball and stud to eliminate any binding between the spring cup and jack bolt. The stud threads into jack bolts with an internal thread (Allstar ALL56090). Two styles available: Welded Style, where spring sleeve is welded to the plate, or Pro-Series which incorporates a bolt-on spring sleeve. The Pro-Series allows proper fit to varying coil spring diameters and rates.Swivler Spring Cup 3.25" Availability: Usually ships the next business day 56082$42.99 Don't see what you want? .......... Need help? Or, IF THERE IS NO ORDER BUTTON AVAILABLE on the part you want to buy, please call us TOLL FREE at 1-888-6 GO FAST(1-888-646-3278) Monday - Friday 8AM - 4:30PM Pacific Time and talk to one of our experienced Sales Agents. Some parts may not be legal for sale or use in California and other states on any polution controlled motor vehicles. Check your local laws for use. Copyright © GoFastParts.com all rights reserved. No part of this site may be reproduced without prior written consent.