1.Multicoated optics guarantee superior light transmission and brightness. 2. Prefect for auto repair and machinery where metric threads are specified. 3.Easily switched from left to right handed operation, or locked for non-ratcheting use. 4.suitable for soft metal, such as aluminum plate, iron plate. high speed steel 6542, suitable for ordinary stainless steel and other hard materials Product Description Color: Silver Material: Alloy steel Size: 12CM Tap size: M3 x 0.5CM, M4 x 0.7CM, M5 x 0.8CM, M6 x 1.0CM, M7 x 1.0CM, M8 x 1.25CM, M10 x 1.5CM, M12 x 1.75 Package Content: 14pc x Tap 2 x Wrench 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.