Hold Open. The DORMAKABA BTS75R Floor Spring Door Closer is a non-handed unit, suitable for both left-hand and right-hand single and double action door applications up to 160kg, conforming to BS EN 1154. It features adjustable spring strength (EN 2-5) and closing speed, with a hold open (90°) or no hold open option available. It has a fully hydraulically controlled backcheck and closing cycle. The door closer comes without spindle and the universal cover plate is supplied separately. . Suitable for most applications. Non-handed for use with both left and right handed doors. Suitable for use with single and double action door applications. Adjustable spring strength (EN 2-5)