12-Piece Nickel-Plated Brass Cork Borer Set, 4-18mm, German Pattern Safety Supplies_Gloves this wooden simple-machine model lets

this wooden simple-machine model lets students measure input effort against output splitting force at different wedge angles

and hinge-distance scales adjustable from 0 to 45 degrees

and gas control on LPG or butane for high-temperature chemistry heating applications

the lightweight beveled body giving safer per-desk Snell's law and lateral-displacement demos

and vacuum connections in laboratory apparatus

12-Piece Nickel-Plated Brass Cork Borer Set, 4-18mm, German Pattern Safety Supplies_Gloves this wooden simple-machine model letsNickel plated brass cork borer set includes 12 German pattern sizes from 4 18mm for creating precise holes in cork and rubber stoppers.