Abstract: A set of fasteners is adapted to fasten a motherboard on a computer housing. The motherboard has a first side, a second side, and a fastener slot that extends through the first and second sides. Each of the fasteners includes a positioning member and a spring arm. The positioning member permits movement of the motherboard from an unlocking position, where a periphery of the fastener slot is disengaged from the positioning member, and a locking position, where the periphery of the fastener slot is engaged within a groove in the positioning member. The spring arm is connected to the positioning member so as to be adapted to abut against the motherboard to urge the motherboard to engage the positioning member when the motherboard is at the locking position.

Abstract: A strap fastener of a swimming flipper uses the resilience of a spring to press a wedge block of a wedge block set and a bevel of a main body to tightly depress the fastening strap of the swimming flipper. For fastening, the said flipper fastening strap goes vertically into the fastener to improve the fastening method of bending the traditional fastening strap reversely at 180°, to eliminate the situation of bending and cracking generated after a certain period of application and to increase the useful life of the present invention. Moreover, the fastening strap of the swimming flipper of the present invention goes vertically into the fastener, closely attaches to the main body of the swimming flipper and turns along with the direction of flowing water during swimming or diving to thereby reduce the water resistance and enhance the diving efficiency.