Amusements in Mathematics: Henry Ernest Dudeney's Puzzling Pursuits

3-Piece SPI 17-634-7 Calibrated Mechanical Outside Micrometer Set: 0 to 3 inch Range

Joyzan Outside Micrometer, Alloy Professional Metric Inch Measuring Tool Set High Precision Graduation Thickness Gauge 0.01mm Resolution Accuracy 0 to 25mm Range Ratchet Stop Machinist Industrial

Accusize Industrial Tools 1-2''/25-50mm x 0.00005''/0.001mm 2 Key Electronic Digital Outside Micrometer, mm/inch, Metric/Imperial, Md71-0002

0-4In Outside Micrometer & Accessories, Professional 0.0001 Precision Machinist Tool W/Carbide Tips for Industrial Measuring Tools (4-Pack)

Accusize Industrial Tools 2-3''/50-75mm by 0.00005'' 2 Keys Electronic Digital Outside Micrometer, Md71-0003

Accusize Industrial Tools 2-3'' by 0.001'' Screw Thread Micrometer with 4 Anvil in Fitted Box, S916-C752

Accusize Industrial Tools 6 Pc Ultra-Precision Outside Micrometer Set Plus a Portable Micrometer Stand and a 6pc Telescoping Gauge Set, 0906-C153

Accusize Industrial Tools 0-1'' x 0.0001'' Multi Anvil Micrometer in Fitted Box, P101-S100