These TSS Thumbturns are specifically designed for use with TSS mortice (rack) door/window spline(star) key bolts. Please note these have a smaller spline diamtere and will not work with Yale or ERA mortice rack bolts.

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TSS believes that quality doesn’t have to come with a high price tag. TSS to provide high-quality products to the trade that meet specification requirements, all at an affordable price. TSS manufactures its products to high standards to ensure their products are an improvement on your current product choice.