From Amazon
wolfcraft EHZ PRO One-Hand Clamp 65/150 mm I 3456000 I The professional one-hand clamp - clamping and opening with just one hand
Conrad Electronic
One-handed clamp EHZ PRO Wolfcraft 3456000 Span width (max.):150 mm Nosing length:65 mm
ShopBetter24
Corner clamp Wolfcraft 3456000
Shopaide
Corner clamp Wolfcraft 3456000