Layered 3 pieces of 3 mm plywood. With a functioning lock that can be used from the top with a screwdriver.
Zero-clearance insert for Ridgid table saw - isn't pretty but it works! : r/woodworking
Poor man's quick & dirty Bosch GTS 635-216 zero clearance insert : r/woodworking
Band saw zero clearance insert?
Poor man's quick & dirty Bosch GTS 635-216 zero clearance insert : r/woodworking
Zero Clearance Fireplace Recommendation for New Construction
Bosch Model 4000 & 4100 Series Table Saw Zero-Clearance Blade Insert 4130 Approx Dims 13-5/8 in x 3-3/4 in x 3/8 in
Poor man's quick & dirty Bosch GTS 635-216 zero clearance insert : r/woodworking
GTS 635-216 Table Saw
Zero Gap Table Insert for BOSCH GTS 635-216 Table Saw, Zero Clearance
Poor man's quick & dirty Bosch GTS 635-216 zero clearance insert : r/woodworking
Zero Clearance Table Saw Insert