300PCS Heat Shrink Connectors - Sopoby Electrical Wire Connectors Crimp Connectors - Insulated Automotive Marine Wire Terminal Kit - Butt Connectors Spade Connectors Bullet Connectors

I really do not review items. Do not buy if you want a reliable connection. Cheap low grade connectors. Crimp area is to thin and wire will pull out with very little pull tension. Metal is very thin and a proper crimp cannot be obtained. I know what is good and what is not. United States Navy Submarine Electronics Technician, Merchant Marine Chief Engineer Ocean Service Vessels, Assistant Engineer Limited Oceans and Ships Electrical/Electronic Technician.

These work well. I see a bunch of negative reviews about the connections slipping off after crimping. Remember... You need to heat shrink these with a heat gun. That's how they are designed to be used. I haven't had any slip off because I heat shrunk them on, as intended.My only complaint is that the case came with a broken tab, so the box doesn't close securely.

MY CRIMPER WORKS VERY WELL WITH OTHER CONTACTS, BUT WHEN I CRIMP THESE CONTACTS I HAVE TO HAND CRIMP WITH A PAIR OF PLIERS AS HARD AS I CAN, AND STILL HAVE THE WIRES PULL OUT ME. NOT SURE IF I HAVE GOOD ELECTRICAL CONNECTION BETWEEN WIRE AND CONTACT. WHEN I CRIMP WITH A CRIMPING TOOL MADE FOR THESE CONTACT THE WIRE ALWAYS FALLS OUT IF THE CONTACT, AND I RE-CRIMP WITH PLIERS. NOT SURE IF METAL IN CONTACT IS CRAP, OR THE CONTACT MATERIAL IS TO THIN, OR A COMBINATION OF BOTH.

Great price for a solid product. Good variety of connectors and just as high quality as any I've seen before. If your looking to keep a professional stock of electrical connections I would recommend this product. Came well organized also.

These arrived okay, but the little turrets inside are THIN and SHORT. There's seemingly more heat shrink plastic vs turret metal for crimping. They barely hang on if at all. I'll be buying elsewhere so I can have something that will actually hold wire. These may have better use on solid vs stranded wire.

I have a similar problem as others have noted. When I try to crimp these connectors with a professional crimping tool the wires simply pull out. I think the metal is too thin.I bought these to have on hand as my supply was running low. Now that I try to use them, the don't work properly and the return window has closed. I recommend looking for a different product.

These work great. I do a lot of auto electric work as well as outdoor electrical work. As an electrician I use these often.

Easy to use and has made strong bonded connectors. Connections are first crimped and then the insulation is heated. The crimping bonds the bare wire to the metal of the connector and the heat shrink bonds the insulation of the connector to the insulation of the wire. Having a quality wire crimper with multiple heads and heat gun are strongly recommended.