About this item 

• Versatile assortment of 150 standard nylon lock nuts in 7 common SAE sizes for convenient all-purpose use most ideal for professionals and DIYers 
• Nylon collar replaces lock washers preventing bolts from coming out for a more secure and durable hold 
• High quality polymer-insert lock nuts resist turning, preventing nut from loosening under vibration and torque 
• Extra sturdy compartmentalized plastic carrying case allows neat organization and convenient storage for any garage, work bench, or on the go job sites 
• Wide range of uses included in kit comes with the following sizes: M5x24 (25 Ct), 1/4"x20 (35 Ct), 1/4"x28 (25 Ct), 5/16"x18 (30 Ct), 3/8"x16 (25 Ct), 1/2"x13 (10 Ct)