The description of this item states that it is SMD parts. The width of the post to hook is about 0.84mm; the depth of the post to the hook is about 0.4mm; Hook approx. 1.7 mm. So if you have an MCU with pins that are 1.27mm apart and about 0.9mm apart (e.g. Atmel Attiny85-SU) you can't use them to connect to the MCU's pins . This element was even too big to connect. to the 6mm x 6mm Gullwing tactile switch legs and will obviously not connect to any of the 0603 components on the SMD board.