When customers saw our TRF at first sight, they said they cannot imagine how to use them. This flip cartoon give us hints about what kind of places we can used.     Looking forward to your any question and request！  

To use space saving bolt and screws, customer ask hardness sometimes. Base on standard products like DIN912 socket cap screw and DIN7984 low head cap screw satisfied hardness demand. In the case of extra low head cap screw, head hardness and thread hardness are often different. (ex. Head 5.8 / thread 8.8) To make clear in your mind, we show you head height order below. Head Height 310Slim＜Ex Low Head ＜DIN7984＜DIN912 Hex Socket Cap