Nishant Engineers Pvt. Ltd. Offers Senior Revolution Counter with left and right side drive. Nishant Engineers Pvt. Ltd. Is an ISO 9001:2000 certified company which manufactures mechanical counters. Senior Revolution Counter with left and right side drive is a five digit mechanical counter. Senior Revolution Counter with left and right side drive features left hand and right hand side lever reset. The direction of Senior Revolution Counter is top going as well as top coming. This mechanical counter include both left and right side drives.