This fixture holds each end of the connecting rod on the scale separately, for weighing the big and small ends. It comes with two mandrels to cover most popular engines, and it is ordinarily used with a digital or mechanical weighing scale.Proform Engine Connecting Rod Balancing Tool 66844Specifications: Feature/Benefit This fixture holds each end of the connecting rod on the scale separately, for weighing the big and small ends. Tool Type Connecting Rod Balancer Tools Category Conn. Rod Balancer Description_ABR Rod Tool Description_SHO Conn. Rod Balancer Description_INV Connecting Rod Balancer Scale Fixture Description_DEF Engine Connecting Rod Balancing Tool Description_ASC Engine Connecting Rod Balancer Scale Fixture Description_ASC Dual Mandrel Design Description_LAB Engine Connecting Rod Balancer Scale Fixture Description_LAB Dual Mandrel Design Description_DES Engine Connecting Rod Balancer Scale Fixture Description_DES Dual Mandrel Design Description_EXT Engine Connecting Rod Balancer Scale Fixture Description_EXT Dual Mandrel Design Description_EXT Made from High-Quality Steel and Aluminum Material Description_EXT Universal Model Works With Most Popular Connecting Rods Description_EXT Sold Individually Description_MKT This fixture holds each end of the connecting rod on the scale separately, for weighing the big and small ends. It comes with two mandrels to cover most popular engines, and it is ordinarily used with a digital or mechanical weighing scale.