So after a few months of using this tool the center finder is off by 1/8 inch. This is because the channel the pen is gripped in is wider than the pen itself, which also causes it to move when centered.
Empire Level E250M: 12-Inch Heavy Duty Professional Combination Square with Etched π Stainless Steel Blade, Metric Graduations and True Blue Vial - Accurate Measurements Guaranteed
8 Review
Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review
π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review
π² Johnson RAS-1B Johnny Square: Professional Aluminum Rafter Square, 7'', Silver - Top Quality with 1 Square
8 Review
Precision Laser Level: Firecore 2X360 Self-Leveling Green Beam Tool With Pulse Mode And Rechargeable Battery For Accurate Alignment And Versatile Use
22 Review
High-Quality Beaquicy Replacement Dryer Lint Filter And Cover Housing Set For Kenmore And LG Dryers (ADQ56656401 And MCK49049101 Models)
19 Review
ICEPURE 2PACK Replacement for GE MWFINT, 197D6321P006, WFC1201, GSH25JSDDSS, PSHS6PGZBESS, SGF-G9, RWF1060 Refrigerator Water Filter - Efficient Filtering Solution for Your Fridge
22 Review
21 Inch Heat Resistant Stove Gap Covers - Kitchen Counter Sealing Spills Protection (2 Pack, Semi-Clear)
21 Review