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| About us History... |
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Tools by YIH CHENG FACTORY CO.,LTD offer quality to meet the strictest demand . Each item is produced by rigorously process and carefully selected raw material. Experienced and skilled craftsmen guaranteed of product accurate dimension and excellent performance exceeding the requirements of relevant DIN and ISO standard. For the last 50 years... |
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| Factory Our Factory... |
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The SVCM steel that the Y.C. is using for the current screwdriver’s blade has been developed with steel manufacture past more than 10 years. This SVCM steel has the high hardness and excellent toughness and elastic feature. Y.C. blade steel has the high coefficient of hardness to avoid the wear and tear. The high torque coefficient will prevent the screwdriver to break when the tools is overstressed. Y.C. screwdriver which is made from special spring steel has the hardness coefficient 58-56HRC. The Y.C. own heart treatment skill ... |
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| Product Nut Driver Set |
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Tools by YIH CHENG FACTORY CO.,LTD offer quality to meet the strictest demand . Each item is produced by rigorously process and carefully selected raw material. Experienced and skilled craftsmen guaranteed of product accurate dimension and excellent performance exceeding the requirements of relevant DIN and ISO standard. For the last 50 years... |
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