Features 1.Wide Application: Perfect for auto mechanic garage workshop power equipment auto truck lawn mower small engine repair and fastening. 2.Multiple Sizes: 6 different sizes in a convenient grid storage box including M1.5x25 M2.5x25 M2.5x40 M3x30 M3x40 M4x60 meet your different daily needs. 3.Hairpin Design: Cotter pin can fast and securely fasten bolts and pins and the special lock ensures a firm fixation and longlasting durability. 4.Durable Material: Made of high quality 304 stainless steel rust resistant durable and stable high quality material and structure ensure long service life. 5.Easy Use: When tightening the nut put the cotter pin into the nut slot and the bolt tail hole and pull out the end of the cotter pin to prevent the nut from rotating relative to the bolt. Specification Item Type:Cotter Pin Assortment KitMaterial: 304 stainless steelIncluded size: M1.5 x 25 M2.5 x 25 M2.5 x 40 M3 x 30 M3 x 40 M4 x 60M1.5 x 25 - 100 piecesM2.5 x 25 - 80 piecesM2.5 x 40 - 60 piecesM3 x 30 - 40 piecesM3 x 40 - 30 piecesM4 x 60 - 30 piecesFitment: Car Garage Workshop Truck Lawn Mower Small Engine Package List 340 x Cotter Pin