The blade retraction is spring-loaded, and with a small ring and a bit of wire, the blade gets its automatic draw and retraction. The arm brace is where this project really shines. [Matt] crafted ...

As with Wen’s 6-inch jointer (reviewed below), it features a spring-loaded blade guard and push blocks for safety. While users may need to spend a little time aligning this model once it’s ...

allowing the full length of the blade to remain on the ice. There is a spring-loaded hinge under the ball of the foot to snap (or “clap”) the blade back into its original position. Clap skates are ...