JMK Dual Duty Firm Lock Pulleys are standard range of metric pulleys as they eliminate reboring and keywaying. These pulleys need not be finished according to different bore and keyway. Firm Lock Bushes holds the shafts firm and easy to dismantle when necessary. Pulleys are manufactured from graded cast iron conforming to IS 3142 : 1993 to match V - Belts manufactured by reputed V-Belt manufacturers. We are the skippers of the above mentioned products for our economical range and value added products. So, come, see, and feel the comfort of our products which we will cater to your need. It is our belief that has been strengthened with years of experience that none of the services offered are complete without a universal feature i.e. Economy. We combine this element with all others that we have to present a customized package for our customers who have never found a reason to look for alternatives since we first served them.