A tool for installing components, the tool comprising: - a connecting portion configured to be arranged between two fingers (8, 9) of a hand of a person, the connecting portion comprising a first longitudinal extension; - an installing portion configured to be supported on a first side of the fingers (8, 9), the installing portion comprising a second longitudinal extension extending angularly to the first longitudinal extension; and - a supporting portion comprising a third longitudinal extension extending angularly to the first longitudinal extension, wherein the installing portion and the supporting portion are connected with each other by the connecting portion, wherein the installing portion comprises a fifth side facing away from the supporting portion, and wherein the supporting portion is configured to be supported on the palm of the hand and/or to be embraced by the fingers (8, 9) extending between the installing and supporting portions (12, 15), thereby: ∘ supporting, on a second side of the fingers (8, 9), a third side of the supporting portion, the third side facing towards the installing portion; and ∘ supporting, on the palm of the hand or on the fingertips of the fingers (8, 9), a fourth side of the supporting portion, the fourth side facing away from the installing portion; characterized in that: - the fifth side is made of a self-adhesive polymer material; - the tool comprises a base body made of a first material, the base body being encased by a layer made of a second material different from the first material, wherein the layer forms an outer shell of the tool, wherein the outer shell is configured to be brought into direct contact with the fingers (8, 9); - the tool comprises a first member made of the self-adhesive polymer material; - the tool comprises a second member comprising the base body and the layer; - the first member is formed separately from the second member and connected to the second member. - a connecting portion configured to be arranged between two fingers (8, 9) of a hand of a person, the connecting portion comprising a first longitudinal extension; - an installing portion configured to be supported on a first side of the fingers (8, 9), the installing portion comprising a second longitudinal extension extending angularly to the first longitudinal extension; and - a supporting portion comprising a third longitudinal extension extending angularly to the first longitudinal extension, wherein the installing portion and the supporting portion are connected with each other by the connecting portion, wherein the installing portion comprises a fifth side facing away from the supporting portion, and wherein the supporting portion is configured to be supported on the palm of the hand and/or to be embraced by the fingers (8, 9) extending between the installing and supporting portions (12, 15), thereby: ∘ supporting, on a second side of the fingers (8, 9), a third side of the supporting portion, the third side facing towards the installing portion; and ∘ supporting, on the palm of the hand or on the fingertips of the fingers (8, 9), a fourth side of the supporting portion, the fourth side facing away from the installing portion; characterized in that: ∘ supporting, on a second side of the fingers (8, 9), a third side of the supporting portion, the third side facing towards the installing portion; and ∘ supporting, on the palm of the hand or on the fingertips of the fingers (8, 9), a fourth side of the supporting portion, the fourth side facing away from the installing portion; - the fifth side is made of a self-adhesive polymer material; - the tool comprises a base body made of a first material, the base body being encased by a layer made of a second material different from the first material, wherein the layer forms an outer shell of the tool, wherein the outer shell is configured to be brought into direct contact with the fingers (8, 9); - the tool comprises a first member made of the self-adhesive polymer material; - the tool comprises a second member comprising the base body and the layer; - the first member is formed separately from the second member and connected to the second member.