Material:Made of steel and plastic. Flexible, resilient and durable. Function:They can effortlessly removing terminal wires from the wire harness connector and add a wire, which won't cause any damage. Compatible:The tools set is a universal tools suitable for most connector terminal which can be used for most cars, motorcycles and other electronic devices (such as household appliances). Using:No need to pry open the terminals, just push and pull the terminal pins.It provide extra leverage that you can easily take out the wire. Compact shape made them easy to use and carry. The tools set is designed to take out electronic devices without damage the devices. No need prize up the terminals, just push and pull the terminals pins with the tools set. Compatible with: The tools set is a universal tools suitable for most connector terminal which can be used for most cars, motorcycles and other electronic devices (such as household appliances). Specification: Plastic cover handle pin extractor: Single-pin width: 0.8mm, 1mm, 1.2mm, 1.4mm, 3mm, Single needle tip. Double-pin inner(outer) diameter: 2mm(3.5mm), 3mm(4.5mm), 3mm(8mm), 4.5mm(6mm), 6mm(7.5mm), Double needle with round. Casing diameter: 2mm 2.5mm 3mm 3.9mm 4.9mm 6.2mm; Steel handle pin extractor: Single-pin width: 2mm. Double-pin inner(outer) diameter: 1mm(3mm), 2.5mm(5mm). You can also query the specification from the product picture color:silver+black Package Contents: 42Pcs Single Pin Extractor 48Pcs Double Pin Extractor 36Pcs Casing Tool Notice: Sharp parts, please keep away from children. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.