A frame for a sit-stand-table comprising a height-adjustable lifting column with at least two telescopically arranged profiles (5,6,7), two bolts (14,15) and two activation pins (18,19), a foot comprising an upper part having holes (12,13) for the bolts (14,15) and holes (20,21) for the activation pins (18,19), a fastening mechanism arranged inside the foot accessible through the two holes (12,13) for the bolts (14,15) and the two holes (20,21) for the activation pins (18,19), and where the fastening mechanism further comprises a spring biased spacer having a spring, two holes (32,33) aligned with the two holes (12,13) for the bolts (14,15), two tensions springs (25,26), and two clamping sleds (23,24) each having a guide (46,47) with an open end (48,49) and where the clamping sleds (23,24) are connected by the two tension springs (25,26), and where the spring biased spacer is configured to set in either 1) An inactive state where the spring biased spacer is in forced engagement with an inner side of the upper part of the foot, 2) An active state where the two activation pins (18,19) are moved to displace the spring biased spacer out of engagement with the inner side of the upper part of the foot, and where the clamping sleds (23,24) and the tension springs (25,26) are configured to set in either 3) An extracted state where the clamping sleds (23,24) are in forced engagement with opposite sides of the spring biased spacer when the spring biased spacer is in the inactive state, 4) A retracted state where clamping sleds (23,24) are pulled towards each other by the two tensions springs (25,26) such that the guides (46,47) engage with bolts (14,15) when the spring biased spacer is in the active state. a height-adjustable lifting column with at least two telescopically arranged profiles (5,6,7), two bolts (14,15) and two activation pins (18,19), a foot comprising an upper part having holes (12,13) for the bolts (14,15) and holes (20,21) for the activation pins (18,19), a fastening mechanism arranged inside the foot accessible through the two holes (12,13) for the bolts (14,15) and the two holes (20,21) for the activation pins (18,19), and where the fastening mechanism further comprises a spring biased spacer having a spring, two holes (32,33) aligned with the two holes (12,13) for the bolts (14,15), a spring, two holes (32,33) aligned with the two holes (12,13) for the bolts (14,15), two tensions springs (25,26), and two clamping sleds (23,24) each having a guide (46,47) with an open end (48,49) and where the clamping sleds (23,24) are connected by the two tension springs (25,26), and where the spring biased spacer is configured to set in either 1) An inactive state where the spring biased spacer is in forced engagement with an inner side of the upper part of the foot, 2) An active state where the two activation pins (18,19) are moved to displace the spring biased spacer out of engagement with the inner side of the upper part of the foot, 1) An inactive state where the spring biased spacer is in forced engagement with an inner side of the upper part of the foot, 2) An active state where the two activation pins (18,19) are moved to displace the spring biased spacer out of engagement with the inner side of the upper part of the foot, and where the clamping sleds (23,24) and the tension springs (25,26) are configured to set in either 3) An extracted state where the clamping sleds (23,24) are in forced engagement with opposite sides of the spring biased spacer when the spring biased spacer is in the inactive state, 4) A retracted state where clamping sleds (23,24) are pulled towards each other by the two tensions springs (25,26) such that the guides (46,47) engage with bolts (14,15) when the spring biased spacer is in the active state. 3) An extracted state where the clamping sleds (23,24) are in forced engagement with opposite sides of the spring biased spacer when the spring biased spacer is in the inactive state, 4) A retracted state where clamping sleds (23,24) are pulled towards each other by the two tensions springs (25,26) such that the guides (46,47) engage with bolts (14,15) when the spring biased spacer is in the active state.