The ZHP100 Collar Removal Pliers from Zephyr feature a diamond shaped jaw which allows the pliers to grip from any direction and may be used to remove collars in open access applications. The ZHP200 Zephyr Collar Removal Pliers are best suited to smaller aluminum collars (5/16”, 5/8” and 3/4” Fastener sizes.). Zephyr offers 2 styles, both are best suited to small collars.It has been our experience that they do not work as well with large collars, or steel/titanium collars where greater gripping force is required to achieve the required break away torque. For those more difficult collars, we recommend the Savi Socket® style sockets fitted to a standard hand ratchet will usually offer far superior results.