It needs a lot of pressure on the 'hold the centre still' button. The hole for the pencil is very small - I used a retractable pencil as a normal pen / pencil will not fit in the hole. Works well - stable clean circles.
r***a (142)- Bewertung vom Käufer.
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Amazing seller
o***o (514)- Bewertung vom Käufer.
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Received the brass mouse 2 of them. There going to be fittered to my victoriain steam engine. There heavy a