Every Watch Maker Or Repair Professional Should Have A Complete Assortment Of Spring Bars In Every Size. This Set Will Provide You With 18 Sizes, From 7mm To 24mm. You Get An Adequate Supply In Each Size For Many Watch Repairs.* Sizes From 7mm To 24mm * 18 Sizes, 100 Pieces * Boxed In Clear Plastic * For Watch Professionals * Excellent Quality