Square screw heads Have a very square-shaped indentation on the very best of your screw, necessitating a sq.-travel screwdriver or bit. Square screws offer fantastic torque transfer and are often Utilized in woodworking, construction, and other apps where a protected generate is very important. A Phillips tamper-resistant screw is just like a Phil

A pipette (generally spelled as pipet) is many different laboratory software package regularly Employed in chemistry and biology to move a calculated volume of liquid, typically being a media dispenser. Graduated pipettes are more info those which have indicated volume increments along with the tube. These pipettes, which can be found many models,