3rd Normcore Spring Tamper V4 and none of them are very well machined! Decided to at least make the tamping surface flat and perpendicular to the handle which all 3 of these
Amazon.com: Normcore 58.5mm Espresso Coffee Tamper V4 - Spring Loaded Tamper With Stainless Steel Ripple Base - 15lb / 25lb / 30lbs Replacement Springs - Anodized Aluminum Handle and Stand: Home & Kitchen
Amazon.com: Normcore 45.5mm Coffee Tamper - Spring-loaded Tamper – Barista Tools - Espresso Tamper with Mat Fits Flair Pro and Pro 2 – Flat Base…: Home & Kitchen
Normcore Ripple Base Add On for Normcore Spring Loaded Tamper V4 – Watch&Puck