WELDON end mill holders can be used to reliably clamp tools with a lateral clamping face on the cylindrical shank. Due to the clamping screw of the mounting, the tool cannot twist or pull out. The mounting is suitable for clamping tools with cylindrical shanks in accordance with DIN 1835B and DIN 6535HB. Clamping screw included in the scope of delivery or clamping screw with ballhead and length adjustment screw for the slim WELDON end mill holder.