a handle extending along a first central axis;

a handling block connected to the handle and disposed to have a second central axis that is offset from the first central axis;

a plunger connected to the handle to be movable along a direction of the first central axis and moving toward the handling block when manipulated,

wherein the handling block includes:

a body having a connection portion connected to the handle and a contact portion located beneath the connection portion; and

a collection port formed to pass through the body in a direction from the contact portion to the connection portion and configured to collect blood by a capillary force, and

the plunger being movable along the handle along the direction of the first central axis when manipulated to enter the collection port and push the blood collected in the collection port out of the collection port, the plunger is aligned along the second central axis and is axially movable between first and second positions, wherein the plunger in the first position is located outside the handling block and the collection port for allowing the collection port to collect the blood by the capillary force, and the plunger in the second position extends through the handling block and the collection port,

wherein the handle has an axial length that is greater than an axial length of the plunger to facilitate axial movement of the plunger and gripping of the handle by a user,

the handle includes:

the plunger includes a slider slidably coupled to the rail along the direction of the first central axis such that the plunger is connected to the handle and aligned on the second central axis in both the first and the second positions, and

the handle includes stoppers formed on the main portion, the stoppers including: