Scalpel blades and holders are surgical instruments used for making precise incisions and dissections in biological tissues. They consist of a sharp blade and a handle or holder for gripping and manipulating the blade., Scalpel blades are available in various shapes and sizes to suit different surgical procedures. They are typically made of stainless steel and are sterilized before use. Scalpel holders provide a secure grip on the blade and allow for controlled movements during surgery.