液壓助力楔形夾具自對中設計確保了樣件被載入時楔塊均勻完整受力，任何水準向的楔塊移動都不會改變樣件的受力狀況。具有以下特點：側邊裝夾樣件便捷、輕鬆；同一位置夾持樣件，確保最小化彎曲應變，避免給試驗結果帶來不利影響；可調的夾持力、種類繁多的楔塊適應不同類型材料的不同試驗要求；因此被廣泛應用於各類拉伸、疲勞試驗應用之中。

The hydraulic wedge grips self-alignment design ensures that the wedge is evenly and completely forced when the sample is loaded. It has the following characteristics: side-loading wedge grips clamp specimen exactly the same way for consistent repeatable testing results, lateral gripping force minimize the bending strains. An adjustable gripping force that allows the grips to be used for testing a variety of material including plastics and ceramics and prevents damage specimens from grip or specimen slippage during testing. A variety of wedges are available for the hydraulic grips.